/Who [\<wildcard string\> [o]]
*
/Who examines all the information a server received on registration for a particular string. This means that the user name, the nick name, the hostname, the user information and the server name are all searched for the string supplied.
If the optional 'o' is present, only operators are returned.
If no arguments are given, all users on IRC are returned. Like /List, this will probably make the server disconnect you. If you really mean to do this, use /Who! instead.
*
/Who \*JFTerm\*
*
would list all JFTerm users currently on IRC.
