Firewall: can you have different settings for different network adapters?

I've got a mac mini that is visible on the open internet via a SDSL line / fixed IP. I'd like to lock down the connection as much as possible - in particular limit the ports to just those needed by the servers that sit on that machine. But I use VNC to control the machine on a day-to-day basis (it runs without monitor or keyboard). I connect the VNC client via our internal Wireless network - but to open the port for the VNC system I have to open the port for both wireless and wired adapters.
Is there any way I can set the OS X firewall to only open the VNC ports on the wireless adapter?
Thanks in advance for your help.
G.

i don think you can bind a rule to an adapter but you could fairly easily say i only want adress like 192.168.. to be able to connect to VNC or something like that and that way you can limit it to machines on the local subnet - you could also use an "or" statement to add a couple remotoe addresses if you need to.
http://www.hmug.org/man/8/ipfw.php

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