From the doc: 'A Identd is used to 'spoof ' a username. EX: if your real username is Drago, I would use the identd and for the username 'Blah' when I went on iRC my /whois would look like 'Blah@' instead of Drago. A Identd also stops the ~ (tilde) from showing in your /whois on iRC also. Identd Daemons can also be used to FTP, Telnet, WWW, or any other internet related item that checks ident.'
x-identd.exe