If you open a new QLab 5 workspace the default network cue patch is localhost. Even if you are not connected to a network this functions to send network cues from a QLab 5 workspace to QLab 5 i.e itself
sending to 127.0.0.1 port 53000 from an external app will control a QLab 5 workspace, but the OSC access page must be set up to allow this WITHOUT PASSCODE
This works from companion running on the same computer configured:
Or have I misunderstood what you are trying to do .
MIc