This is the  doinkd - user activity monitor  project ("idled")

This project was registered on SourceForge.net on May 25, 2006, and is
described by the project team as follows:

The idle daemon (doinkd) monitors user activity and logs them off when
predefined rules are met. These include session time, multiple logins,
tty, idletime and group limits. Similar to the Unix idleout command,
but much more configurable. Formerly idled.