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

       /BY_OWNER[=uic]

    Selects files whose owner's UIC matches the UIC specified with
    uic. The default UIC is that of the current process.

    Specify the UIC by using the standard format described in the
    OpenVMS Guide to System Security.