Why isnt' this built in? User IP at registration?

[Jolten]

Yeah, you are correct, it will display their IP in the user options. But searching for matching IPs results in a big fat Ø unless the user has posted. Heck, even searching IPs for a specific user's IP turns up Ø unless they have posted. So I can have 15 accounts with the same IP and unless they post, the search won't pick up on it. The search doesn't query the user IPs it queries post IPs.

I need to search all IPs. Regardless of whether a user accoutn has posted or not.

Actually I need to disallow registration if the IP already has an account.