yes its possible but the only way i can think of is to download 2 different versions of cgminer or cgminer and bfgminer assign the miners to them (its in there read me files) bfgminer uses \.\\com6 and the name of the miner BFL, BHX, for cgminer or something like that. then run both files. take a bit out of the pi but it should do it.