ubuntu 12.04 - Selective Synchronization of Connection Tracking State Tables between Firewalls using conntrackd -

i have got 3 firewalls running on ubuntu 12.04 server in active/backup/backup mode. firewalls using iptables. using keepalived , conntrack-tools "high availability" , connection tracking state table synchronization.

what want achieve here make synchronization of state tables selective. instance, if have 3 connections (a, b, c) in state table entry in master, want backup 1 firewall sync connections , b, , backup 2 firewall sync connections , c.

is there way apply such filter , make synchronization selective?