lwinv in the permissions tab in the admin area add the tag you want to restrict and modify "view discussions", that's actually the first permission listed. If you set that something else than members, the tag is restricted.
lwinv A few days ago, when I used the plug-in to test the data, my hand slipped and hit 0, which resulted in 1000 posts being generated.
I assume you used fake data? That's a pity, you can probably start fresh or manually clean up the database.