VMS Help SUBMIT, Qualifiers, /USER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /USER=username

    Requires CMKRNL (change mode to kernel) privilege and read (R)
    and write (W)  access to the user authorization file (UAF).

    Allows you to submit a job on behalf of another user. The job
    runs exactly as if that user had submitted it. The job runs
    under that user's user name and user identification code (UIC),
    and accounting information is logged to that user's account.
    By default, the user identification comes from the requesting
    process. The username qualifier value can be any user name
    that is validated on your system. The name must be 1 to 12
    alphanumeric characters.