CMS for social network. The main condition is that one person can join one group. Is there such a thing?

Question

CMS

Recommend a CMS for a social network. The main condition is that one person can join one group.
There are conditions:
Users, when joining one group, should automatically leave the previous one.
When registering, the user must be registered in the default group.
Additionally:
Events with a map.
Thank you.

Answer 1

the main rule of developers using cms is to choose something similar and refine it with a file. If you can't do it yourself, hire a professional.

Answer 2

livestreet.ru or its fork altocms.ru
Pretty easy to customize to your requirements. There is documentation (of course, not very complete, but there is), there is a community and there is the possibility of easy extension using plugins. Easy to finish yourself with minimal skills.

Answer 3

For social networks have a couple of engines, although they are paid. But there are definitely nulled
https://www.socialengine.com
viiengine.ru
Under the vii engine, I know there are many assemblies, plugins. And in general, it is easy to modify it, you need a programmer with DLE + PHP experience. A competent student will do.