I apologize for this question, as it must have been answered before. Just can’t find that answer.
I want to create three groups of people who use my Discourse instance. But I want members of a given group to ONLY see the posts, messages, categories, tags, members, etc., from their own group.
How do I set this up? Or do I need to have a separate Discourse instance for the kind of walled-off group I’m describing?