/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 print a job on behalf of another user. The print
    job runs exactly as if that user had submitted it. The print
    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 user name qualifier value can be any
    user name that is valid on your system. The name must be 1 to 12
    alphanumeric characters.