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

       /PRODUCER=producer-name

    Displays software product licenses active on the current node
    and supplied by the specified producer. The asterisk (*) and
    the percent sign (%) wildcard characters are allowed for the
    producer-name parameter. You cannot use the /PRODUCER qualifier
    with the /UNIT_REQUIREMENTS qualifier.