VMS Help DCE_SECURITY, Admin Intro, DCE$EXPORT, SHOW, /EXCLUDE, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 principal

    Specifies the name of the DCE principal to be displayed
    from the EXPORT exclude list. Full OpenVMS wildcarding
    is allowed.

    If the principal name contains lowercase characters,
    spaces, or other special characters, enclose the entire
    string is quotes.

    If /ALL is on the command line, do not specify a principal name.