Test

FrmMain.Designer.cs

@@ -218,9 +218,9 @@
             // 
             // tbxSubscriptionId
             // 
-            this.tbxSubscriptionId.Enabled = false;
             this.tbxSubscriptionId.Location = new System.Drawing.Point(194, 27);
             this.tbxSubscriptionId.Name = "tbxSubscriptionId";
+            this.tbxSubscriptionId.ReadOnly = true;
             this.tbxSubscriptionId.Size = new System.Drawing.Size(88, 21);
             this.tbxSubscriptionId.TabIndex = 2;
             // 

FrmMain.cs

@@ -113,9 +113,10 @@ namespace Test
                 Invoke(new Action(() => onCommand(command)));
                 return;
             }
-            if (command is ServerEventUpdate)
+            var eventUpdate = command as ServerEventUpdate;
+            if (eventUpdate!=null&&eventUpdate.SubscriptionId==_client.ConnectionInfo.SubscriptionId)
             {
-                tbxChannels.Text = (command as ServerEventUpdate).Channels.Join(",");
+                tbxChannels.Text = eventUpdate.Channels.Join(",");
             }
             rtbMessage.AppendText($"{DateTime.Now.ToString("HH:mm:ss")}:{command.GetType().Name} {command.Json}{Environment.NewLine}{Environment.NewLine}");
             rtbMessage.ScrollToCaret();