ICQ Sniffer is a handy network utility to capture and log ICQ chat from computers within the same LAN. It supports messaging through ICQ server with format of plain text, RTF, or HTML. All intercepted messages are well organized by user with buddies.
CommView is a program for monitoring Internet and Local Area Network (LAN) activity capable of capturing and analyzing network packets. With CommView you can see the list of network connections and vital IP statistics and examine individual packets.