RT66N - Tomato - Allow only specific IP(s) through OpenVPN

[fearz]

Hi,

I'm using OpenVPN to connect through strongVPN, when it start, all connected devices use strongVPN IP....I want to only have 1 device connecting through OpenVPN and all other devices remain connected with the real router IP...

Can someone more experienced in scripting or with iptables let me know how to do so?

Thanks a lot