/sys$common/syshlp/helplib.hlb REPLY, Qualifiers, /NODE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /NODE[=(node-name[,...])]

    Sends a message to the local cluster node only. The optional
    parameter list allows you to specify which nodes will receive the
    message. Default sends messages to all cluster nodes.