Hi Jegyun,
As far as I know the Maya jobtype doesn't support image slicing. It could be done, though. A simple jobtype that executes a command similar to this would work:
mayabatch.exe -render -iw WIDTH -ih HEIGHT -xl LEFT -xr RIGHT -yl LOW -yh HIGH -s START_FRAME -e END_FRAME file
I expect that the Maya jobtype could also be modified to render slices, but since it runs Maya interactively rather than through the command line, I don't know how to do it.
--Zack