The LOR Comm Listener is a program that runs in the background, allowing other programs (such as the Sequence Editor and the Show Player) to control LOR devices that are on LOR Enhanced networks, and also to control DMX devices. The Comm Listener must be running in order for those programs to control such devices. When it is running, you will see an application box open in your Windows Task bar.
The LOR Comm Listener is automatically started when the LOR Control Panel is started. However if your license level does not support it or if no Listener port is specified in Network Preferences it will not open. The Comm Listener is automatically shut down when the LOR Control Panel is shut down.
If you have E1.31 or Enhanced Networks make sure that the LOR Control Panel is running. so that you can control your LOR Enhanced devices and DMX devices.
In summary, the Comm Listener must be running for Enhanced and DMX networks to work. If you want the Comm Listener shut down, you must shut down the LOR Control Panel.