set priority to local

Hello all I need help for configuring mgcamd. I have a local 183D card with oscam connected with mgcamd with a N line. But I receive from external a C line connected directly to mgcamd that have the same CAID on it. Obviously when mgc is connected to network and I switch to a tivusat channel, it ignores my local card and get it from the net. Is there a way to set priority for my local instead of external? Thanks

up.. anyone knows howto?