Is there a way on facebook to block someone from seeing your posts to a group if they are in it?

You can “hide” yourself from someone.

You can also remove yourself from the group.

There are privacy setting which can help with this problem do check them in settings.

If you are in a group then you have opened yourself to this person – any block will not apply in a group. You could report the troublesome behaviour to the group’s admin and hope that they will remove the person. Or remove yourself from the group.

@Stinley: I believe if the OP “hides” themselves from the offender, the offender will not see anything they post, even if it’s in a group.

Good point that they should report the offensive posts to the group admin. The administrators should handle it, as they shouldn’t want that kind of stuff to take place in their group.

I blocked my ex, and even though we are in a group together I can’t see anything he posts and he can’t see what I post, maybe the previous time they already posted thats why you could still see them, and them you. Try to block the person and then log out and in again and post, see what happens.

I think @jca is correct, here. I belong to a group where one member has blocked another successfully. The threads appear somewhat disjointed sometimes, but it is possible.

It’s hilarious. I had a few to many political disagreements that turned into fights with someone. We mutually blocked each other. We don’t see each other’s posts in the group we’re both in but I see people responding to his posts. Usually they are just about as frustrated as I was with him.