VMS Help STOP, /QUEUES, /ON_NODE, Qualifier, /NAME_OF_MANAGER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /NAME_OF_MANAGER=name

    Specifies the name of the queue manager controlling the queues
    you want to stop.

    If the /NAME_OF_MANAGER qualifier is omitted, then the default
    queue manager name SYS$QUEUE_MANAGER is used. For more
    information on multiple queue managers, refer to the chapter
    about the queue manager in the OpenVMS System Manager's Manual.