A way to get a new sign up's IP address or last login IP address on User page

[MrCaspan]

It would be really useful to get the IP address of a user when they sign up and then replace that with the last login IP and put that information in the user page only viewable to those with permissions. This way you can see the last IP address with a flag.

This really helps moderators to determine where users are posting from and make decisions AKA our forum is Canadian and no reason for people from other places to register and post.