Access restricted for each Member, not each membership

I'm looking at setting up a multisite network, where on each site, there will be one admin and about 5-10 users. Each user should just be able to view the posts or pages that are for them (and a few common pages). I thought by creating a Post Category for each user this plugin would do that, but it seems to work more on a membership level, not a member level. Is this right, or is there some way I can do this here?