I'm just working on a patchset which will make it possible to assign distinct design rules to every layer, not to every net; however, if you route the net in a dedicated layer, it will be the same (note that I'm speaking about PCB layers which are united in groups to produce single copper layer per group). if you are interested, I can push my work in progress into my GIT repository. currently, it lacks GTK UI (the Lesstif should work; you also can add design rules to PCB manually via external text editor); also, I plan to add distinct design rules for `pad' layers (component and solder).
I'm just working on a patchset which will make it possible to assign distinct design rules to every layer, not to every net; however, if you route the net in a dedicated layer, it will be the same (note that I'm speaking about PCB layers which are united in groups to produce single copper layer per group). if you are interested, I can push my work in progress into my GIT repository. currently, it lacks GTK UI (the Lesstif should work; you also can add design rules to PCB manually via external text editor); also, I plan to add distinct design rules for `pad' layers (component and solder).