multiple internet connections

Hi,

I'm running IPFilter on FreeBSD 4.10-STABLE.

Is it possible to do something like this:

map ed1 192.168.0.0/24 -> 0/32
rdr ed0 0.0.0.0/0 -> 11.12.13.14, 21.22.23.24, 31.32.33.34

Where 11.12.13.14, 21.22.23.24, and 31.32.33.34 are addresses of external
connections to the Internet (perhaps 3 cable modems), and the connections
would be made in a round robin fashion, or perhaps some other load balancing
algorithm?

Thank you and best regards,
Robert.