On a community post with IP logging turned on, the IPs are visible both to the OP of the post and the community moderators, but to nobody else - is that not what's going on? It should be.

(If we want IP logging turned off in this community, by the way, I'm willing to turn it off - I have no strong feelings about it either way, so. It's just that once in a while you need it, and when you do, you needed it yesterday, so I usually leave it on in my communities unless there's a particular need for anonymity.)