How to set Colliders and Character Controller in real time with ROKOKO suit

Hello, I have a pressing problem. I'm using a motion capture suit (ROKOKO) on Unity, I need to use it in real time for a theatre show. I used it already few months ago for the same show with a dancer, always in real time. The dancer has his own character/avatar displayed on screen.

Unfortunately now, I need to build some walls around my character to avoid him to disappear from the scene and to limit his space. Every theatre is different ... I tried to do it not in real time using a controller and a clip, adding mesh colliders and character controller (no script, I'm not able yet) and it works! I tried the same setting in real time with suit plugged and nothing happened. I don't know how to set it in real time conditions. Any advices? I Hope I'm making my self clear enough.

Thanks

Giulia