As the title says, I am trying to set some of the categories of our Discourse instance so that:
only users who are currently logged in can see/post in them.
Does the feature exist? So far I have only seen custom rules on user groups and a global “set Forums to private” option, and they fall short with respect to what I am trying to do.
You can set your category permission to ‘trust_level_0’, which should accomplish what you’re after? That would only let people who have an account be able to see|reply|create in that category.