Mortus,
It is easy, in the /etc/bamt/bamt.conf file there is a place to specify a pool file for each GPU You can specifiy the same pools file or a seperate on for each GPU.
example:
gpu0:
# Omitted lines
# Omitted lines
pool_file: /etc/bamt/pools_0
# Omitted lines
# Omitted lines
gpu1:
# Omitted lines
# Omitted lines
pool_file: /etc/bamt/pools_1
# Omitted lines
# Omitted lines
gpu2:
# Omitted lines
# Omitted lines
pool_file: /etc/bamt/pools_2
# Omitted lines
# Omitted lines
Then you need to create three pool files in the /etc/bamt directory called pools_1, pools_2, pools_3