I can on mine
I print everything through command workstation ver 5.2.0.46
You can download a new version of command workstation at fiery.com if needed
When I first got the machine, I'm pretty sure it wouldn't do it. Maybe one of the software updates allowed it or perhaps Command Workstation.
While you're printing a job right click on another job and print and hold or "process and hold"
If you are installing the new version of command workstation, be prepared, it is a slightly different interface to learn and it is slow at stupid things like scrolling, but it has more features such as job log and easier job searching.