Whenever you're away from your pc, ClockAssist will track this as absence. After returning back to your computer, you'll be prompted by ClockAssist and be able to track the time that you have been absent.

Tracking absent time is optional. Nobody has access to the time that you've been absent. It's just another way for you to map your day and you're the only one that can see your absent time.

You can set the absence threshold yourself through ClockAssist's settings page.