The question is: as written in the title!
Imagine a situation where Chun, Anne-Marie and Akmed are in a vid chat together. There's no point in Chun seeing himself, he only wants to see the other two and the same goes for them, thus:
Chun: should see Anne-Marie and Akmed
Anne-Marie: should see Chun and Akmed
Akmed: should see Chun and Anne-Marie
as the guy building this for the 3 of them, how can i achieve this?