XF 1.5 quasi-private threads?

Something I've seen elsewhere: A forum where you can't see a thread list, but where you can still see specific threads if given links to them, similar to how a forum that's visible but marked for "don't show in node list" works. Can we do this in XF? So far as I know, "view node" also controls "view things within node".

I know about "see other user's threads". But what I want is for a user to be able to give specific people a link to a thread, but not have it otherwise visible.