@feditips
Thanks for the clarification.
Yes, but that is manual and requires having a list of the potential "group".
Most high-frequency twitter users but also other groups are (correctly) afraid of the "diaspora" threat.
What if they could have some "group service" where they all register for a certain handle on a website, they agree on (or maybe even vote for?!?) certain characteristics the target instance must have (size, location, moderation, etc., maybe even..."