NetXMon v0.6 is a session-based network sniffer with an X interface, and is based on ttywatcher. For Linux and Solaris.
You can download it from the following link: https://packetstormsecurity.com/files/download/14451/netxmon_0.6.tgz
Source: https://packetstormsecurity.com/files/14451/netxmon_0.6.tgz.html