I don´t know if I understood what you intend.
With BR340 is possible to configure protocol filter, multicat, node and other. The protocol filter is possible to discard or forward the layer 3 protocol (eg. IP, IPX), with filter node parameter is possible to forward or discard a specific layer 3 address. If you could explain better the situation or what you intend to configure we can give you some tip.
regards.
