/sys$common/syshlp/helplib.hlb RSH, Qualifiers, /USER_NAME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /USER_NAME=remote_user_name
       -l remote_user_name (UNIX style, valid only on UNIX systems)

    Optional. Default: same name on local host, but in lowercase.

    Your user name on the remote host. Specify this qualifier if your
    user names on the remote host and local host are different.

    To send your user name in uppercase, use either of the following
    ways:

    o  Specify /NOLOWERCASE.

    o  Enclose the user name in quotation marks ( " " ).

    To send your user name in mixed case, enclose it in quotation
    marks ( " " ).