Yes this is weird... Glad to see more being found out about this Timber however the forum I found this on does not have that mod installed but it does point out the problem with having the same IP, security risk IMO.
What I did, Because the welcome threads get people talking, and I can't find another mod like it, was to create a user called "welcome Party" that is basically a bot that never logs on.
It only replicated the I.P's in the welcome threads tho ?