Patrick, I am not sure that there is any easy way to define such an exclusion zone for a particular net class. The whole logic of Altium rules tends to be rules to allow actions rather than disallow. The only suggestion I could make would be to route those nets while placing some form of a keepout arrangement (fills, layer specific keepouts or polygon) in that particular area, later remove it or temporarily shift it to another or non-routing layer.
--
Sincerely,
Brad Velander.
"pacikk" wrote in message
news:1175345651.413401.7990@d57g2000hsg.googlegroups.com...
> Hi everybody,
> Is there a way in Altium 6 to specify a routing rule which defines
> that a particular class of nets can be routed on a particular layer
> but not go over a certain area?
> It\'s like having a keepout but only for a certain class of nets.
>
> Thanks,
> Patrick
>