You can also get that user tracker applied in your tiki installation by means of applying the related "configuration profile" from the "Profiles Wizard" in your Tiki. See:
The one called "User Trackers"
They can be shown at registration time, all or some of the fields from that tracker, etc. The sample profile will get you easily on track with that in your site.
Cheers, and welcome to the Tiki Community!