GPO for multiple branches

Hi guys ,,,

I have a PDC and RODC in multiple branches , in my case i have to create a policy for each branch , that policy should add a specific IP's in Internet Explorer Trusted sites such as :
Branch 01 => 10.10.10.1 - 10.10.10.2

Branch 02 => 11.11.11.1 - 11.11.11.2

etc ,,,

so should i make a policy for each branch with theses specific IP's ? which i see it not logical at all to create 30 policy or 100 policy just for adding a specific IP for each branch .

or is there another way to do that without manual interruption from the IT Guys ?

Thank you