Don,
I found this on oracle support website while searching for a solution to your question. Not sure if it will help you...
Printer delivery uses the same PostScript printer drivers used by UBE jobs, therefore all the same restrictions apply. While EnterpriseOne supports tray selection for PostScript type printers, a single document being redirected to different printer trays is not possible. Enhancement bug 11032016 exists asking for the ability to redirect a single document to different trays.
Thanks,
Soumen