You probably have to do it the hard way. Instead of assign CAID assign services (Channels) to respective cam in use.
All channels assigned to the cam will only use that cam. So for example i use Conax cam for NO and SE
If assign CAID then both cams will try and decode and cause problem.
So i have to assign my SE Sportchannels to the SE conax cam and my NO sport channels to the NO cam
But since most of the Nordic channels also work with softcam i only add the channels that need cam and let oscam take care of the others