Inhibiting output levels from another console

At the venue, we have a Road Hog 4. On occasion, I have a guest LD with a "Brand X" console controlling a floor package. There is a need for me to inhibit the light output of the fixtures he/she is controlling for TV. Both consoles are connected to a network. I have heard it is possible, can somebody please tell me how or point to a section of the manual that does? Thanks! If it works without having both consoles on the same network, please let me know... Cheers