Not at the moment, no, although this is of course planned.
There is a bit of a long-winded workaround, if you are playing different tables at different times:
viewtopic.php?f=15&t=9410&p=43483&hilit=+different+hud+layouts#p43483Another, more resource intensive way of doing it would be create extra groups for the stats you want to use heads up and then on the 6-max tables just drag them all away into a corner on top of each other - each table size has the same stat groups, but the positions are saved separately..