IRCX defines a user mask as follows:
Chat Service interprets special characters in user masks according to the following table.
|!||Specifies that what follows is a user name.|
|@||Specifies that what follows is the domain name or IP address of the computer hosting the client.|
|$||Specifies that what follows is a server name.|
|.||A string containing a period is interpreted as a domain name.|
|*||Wildcard character used to match any number of characters.|
|?||Wildcard character used to match one character.|
Note The identification (using the Ident command) of an anonymous user begins with a tilde (~) so that you can filter anonymous users.
| Makes the user with the nickname Piper
the host of #MyChannel. "Piper" is interpreted as
Note A string without the special characters !, @, and $ is interpreted as a nickname.
|Starts monitoring all events generated by users at the site nwtraders.microsoft.com. "nwtraders.com" is interpreted as "*!*@nwtraders.microsoft.com$*".|