Split meeting in several meetings

Hi
For several months we have hosted Jitsi for our non-profit organization.
The ability to move from one meeting to multiple sub-meetings would be a great future. Sometimes assignments are given to smaller groups during a meeting. Then you should be able to prepare this in smaller groups and then pick up on the bigger picture. The moderator should be able to quickly switch from (sub) meetings and should be able to recall participants from the sub-meetings back to the original meeting.
Johan