How works bridge and gateways?

Have one project, but it can’t use multiple wan address. I’ve a trouble with it, because I use PCC and two ISPs. At somethimes this project define second rout and reserve second ISPs’ WAN address. Can somebody tell how I can block second ISP route on my client in bride interface? Thanks.

Sorry, but I do not understand how to help you, I do not understand anything on your request, it’s hard understand what you want.

Simple. Just don’t assign this second route. Other packets flow you can drop with firewall on layer 3 on your bridge interface which have an IP.