Is is possible to limit concurrent conference room a authenticated user can setup

I want to limit the number of conference room an authenticated user can run concurrently at any time so that a user can not setup and run many conferences at the same time. Is it possible?

As authenticated users has the same jid, this is possible by implementing a custom prosody module.

It will be a limit for concurrent sessions on one shard. So if you have multiple shards you will need a central service of tracking those.

Here is how to access all current sessions
Also this is an example that can be useful