iptables mac address filtering

[Negative <negativebinomial@xxxxxxxxx>]

This may be a dumb question but is it possible to use an iptables rule for mac address filtering to allow vnc access  from a particular machine to one in the office when I'm traveling. That means I'll be using various kinds of internet access that I cannot know in advance (dhcp ip's, etc.)  I tried  using the client laptop's macaddress  like this: 

I tried iptables -I INPUT 9 -m mac --mac-source macaddr -m state --state NEW  -p tcp --dport 5901:5906 -j ACCEPT

But it appears that the server is getting a mac address from my ISP rathere than the originating machine or even my dsl router. If I remove the mac match,  I connect just fine. And if I use a machine on the same network, I can use the rule above.

I've got FC4, with kernel 2.6.17-1.2142_FC4. 

Tia

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