Using a database log, you can track a wide variety of important statistics about your users.
Many web hosting services offer these kinds of statistics, but they are often not configurable.
Using ASP, and your own database tables, you can customize your logs to track anything and everything you want, and display it accordingly.
This script displays information based on user hits. For a private web, username could be tracked, but since was made for a site that requires no login, you'll notice that username is 'Unknown' for all entries.