Library /sys$common/syshlp/tcpip$ucp_help.hlb CREATE, DIRECTORY, Qualifiers, /USER_NAME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /USER_NAME=vms_user_name

    Optional. Default: UID=0 and GID=1 (if you have SYSPRV or BYPASS
    privilege).

    Selects an entry in the proxy database and creates the UID, GID,
    and OpenVMS UIC for the directory files.

    To select a user name that has a UIC different than the UIC of
    the process running the management program, you need SYSPRV or
    BYPASS privilege.

    You can use /USER_NAME in combination with /HOST and /UID.
    However, if you do not have SYSPRV or BYPASS privilege, the
    values you specify must correspond to the values for your user
    name in the proxy database.