@Rairii I don’t know, but as an early adopter of this feature, I’m learning something important: the value of comment controls. If groups become more popular, there needs to be three tools:
Federated comment deletion
Thread locking
Comment queues that allows moderators to review before posting
A Reddit-style auto moderator would be incredibly useful too.
Like #Friendica, /kbin can ban trolls from participating in groups.
Unlike Friendica, you can remove posts local to where the group is hosted.
Unfortunately, the offending comments still appears in user timelines because other Fediverse servers do not delete after comments are removed locally.
Another alternative could be #Calckey which supports groups through "Channels". However these do NOT federate.