Out of the box, it works -- it does record a registered user's IP address upon login.

Since this appears to be the first incarnation of this software, here's what's missing:

- There is no way to purge the long list of IP address being recorded. No way to reset the data. If you have something like 2500 members, one day of data collection is a terribly long list.

- There is no TIMESTAMP on the recorded IP. Only datestamp. As a result, you have something like user Charlie with 28 entries having identical IP address, all having the same datestamp. Not very useful data.

- The statistics page is grouped according to "user". So you can only view a user and see all the IP address he used. That's vague data, especially if he is using dynamic IP. A more useful approach is data grouped according to IP address, and see how many usernames came from a single IP. You can spot trolls and spammers this way.

The form validation code for this plugin is buggy. If you enter the wrong captcha the first time, the page will simply refresh to the same Registration page without informing the user that the captcha entry was wrong. And when you do type the correct captcha the 2nd time, the form no longer validates and the user will be unable to register no matter if all fields have been accurately entered. Basically, the validation codes seem to be messed up. Need more testing.

It would also be nice if the form fields are vertically aligned to each other, for a neater presentation.

Also, most of the time the captcha images being used by this plugin are a bit difficult to read even for humans.