I’m using the viewlevel plugin, which works great. But it’s hard for me to figure out which user levels everyone should have to give them access to only the posts I want them to see. It would be a lot easier to just have the specific topic filters instead of the broad user level access.
The Limit Categories plugin might work if it would apply to post viewing instead of the editing aspect. Like user levels 3, 5 and 6 can see b,c, g categories and levels 9, 1 and 2 can see categories a, d, e. Something like that…