Hi Ivo,
If you want to print the same layout with the same record more than once, you could use number of copies in the layout properties.
If it's actually three different designs that need to be run with the same database, and separated per design, I would recommend creating three different PSM jobs.
If that is a problem due to the work flow, you can create an automation (print automation option needed in dongle) with a script to run the different jobs automatically. If you don't want to script, and have Planet Press Watch available, you can also use that for automation.
Kind regards,
Floris