diff --git a/application/config/migration.php b/application/config/migration.php
index ad5f4c8e..f0bf3d0f 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -22,7 +22,7 @@ $config['migration_enabled'] = TRUE;
 |
 */
 
-$config['migration_version'] = 75;
+$config['migration_version'] = 77;
 
 /*
 |--------------------------------------------------------------------------
diff --git a/application/migrations/077_add_userid_to_hardware.php b/application/migrations/077_add_userid_to_hardware.php
new file mode 100644
index 00000000..8abba611
--- /dev/null
+++ b/application/migrations/077_add_userid_to_hardware.php
@@ -0,0 +1,20 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_add_userid_to_hardware extends CI_Migration {
+
+	public function up()
+	{
+		$fields = array(
+			'user_id BIGINT(20) DEFAULT NULL',
+		);
+
+		$this->dbforge->add_column('cat', $fields);
+	}
+
+	public function down()
+	{
+		$this->dbforge->drop_column('cat', 'user_id');
+	}
+}
diff --git a/application/models/Cat.php b/application/models/Cat.php
index 2f92b788..d6426f21 100644
--- a/application/models/Cat.php
+++ b/application/models/Cat.php
@@ -9,10 +9,11 @@
 		}
 
 		function update($result) {
-		
-			$this->db->where('radio', $result['radio']); 
+
+			$this->db->where('radio', $result['radio']);
+			$this->db->where('user_id', $this->session->userdata('user_id'));
 			$query = $this->db->get('cat');
-			
+
 			if ($query->num_rows() > 0)
 			{
 				if($result['radio'] == "SatPC32") {
@@ -20,7 +21,7 @@
 					foreach ($query->result() as $row)
 					{
 						$radio_id = $row->id;
-						
+
 						$data = array(
 							'sat_name' => $result['sat_name'],
 							'downlink_freq' => $result['downlink_freq'],
@@ -30,14 +31,15 @@
 						);
 
 						$this->db->where('id', $radio_id);
-						$this->db->update('cat', $data); 
+						$this->db->where('user_id', $this->session->userdata('user_id'));
+						$this->db->update('cat', $data);
 					}
 				} else {
 					// Update the record
 					foreach ($query->result() as $row)
 					{
 						$radio_id = $row->id;
-					
+
 						$data = array(
 						'frequency' => $result['frequency'],
 						'mode' => $result['mode'],
@@ -45,12 +47,13 @@
 						);
 
 						$this->db->where('id', $radio_id);
-						$this->db->update('cat', $data); 
+						$this->db->where('user_id', $this->session->userdata('user_id'));
+						$this->db->update('cat', $data);
 					}
 				}
 			} else {
 				// Add a new record
-				
+
 				if($result['radio'] == "SatPC32") {
 					$data = array(
 						'radio' => $result['radio'],
@@ -61,6 +64,7 @@
 						'uplink_freq' => $result['uplink_freq'],
 						'downlink_mode' => $result['downlink_mode'],
 						'uplink_mode' => $result['uplink_mode'],
+						'user_id' => $this->session->userdata('user_id'),
 					);
 				} else {
 					$data = array(
@@ -68,23 +72,25 @@
 						'frequency' => $result['frequency'],
 						'mode' => $result['mode'],
 						'timestamp' => $result['timestamp'],
+						'user_id' => $this->session->userdata('user_id'),
 					);
 				}
 
-				$this->db->insert('cat', $data); 
+				$this->db->insert('cat', $data);
 
 			}
 		}
-		
-	
+
 		function status() {
-			//$this->db->where('radio', $result['radio']); 
+			//$this->db->where('radio', $result['radio']);
+			$this->db->where('user_id', $this->session->userdata('user_id'));
 			$query = $this->db->get('cat');
-			
+
 			return $query;
 		}
 
 		function recent_status() {
+			$this->db->where('user_id', $this->session->userdata('user_id'));
 			$this->db->where("timestamp > date_sub(now(), interval 15 minute)", NULL, FALSE);
 
 			$query = $this->db->get('cat');
@@ -94,27 +100,23 @@
 		/* Return list of radios */
 		function radios() {
 			$this->db->select('id, radio');
+			$this->db->where('user_id', $this->session->userdata('user_id'));
 			$query = $this->db->get('cat');
-			
+
 			return $query;
 		}
-		
 
 		function radio_status($id) {
-
-			return $this->db->query('SELECT *, CONVERT_TZ(`timestamp`, @@session.time_zone, \'+00:00\' ) as newtime FROM `cat` WHERE id = '.$id.' ');
-
+			$sql = 'SELECT *, CONVERT_TZ(`timestamp`, @@session.time_zone, \'+00:00\' ) as newtime FROM `cat` WHERE id = ' . $id . ' and user_id =' . $this->session->userdata('user_id');
+			return $this->db->query($sql);
 		}
 
-
 		function delete($id) {
 			$this->db->where('id', $id);
-			$this->db->delete('cat'); 
-			
+			$this->db->where('user_id', $this->session->userdata('user_id'));
+			$this->db->delete('cat');
+
 			return true;
 		}
-		
-
-
 	}
 ?>