VMS Help DCE_SECURITY, Admin Intro, DCE$IMPORT, IMPORT, Data Qualifiers, /GROUP=group  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /GROUP=group

    Specifies the name of an existing DCE group that is
    associated with the account being created. Note that if
    the group does not exist it is not be created by IMPORT.

    The default group name is "none".