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

       /UID=n

    Optional. Default: None.

    Entry in the proxy database that determines, if necessary, the
    ownership of the container root directory.

    In the proxy database:

    o  UID and GID fields determine the root directory's UNIX
       identity.

    o  User name field determines the OpenVMS ownership.

    Required to access an entry in the proxy database that lacks a
    unique UID, user name, and host combination.

    You can use /UID with the /HOST and /USER_NAME qualifiers. 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.