I think if you start an io-net for every card, you could enter just for the en0 your filter:
io-net -dYourEthernetDevice -ptcpip if=en0…, -dYourFilterDevice
io-net -i1 -dYourNextEtherDev -ptcpip if=en1…
io-net -i2 -dYourNextEtherDev -ptcpip if=en2…
This should just use your filter on the first instance io-net
The second io-net1 and third io-net2 won´t use the filter