Responsibility Wise Invoice Approval

Hi Folks,

I have a requirement that Invoice approvals route on the basis of responsibility wise like as below. Western User Invoices should go to the Western Supervisor, vice versa like North User Invoices should go to the North Supervisor.

Western User > Western Supervisor

North User > North Supervisor

South User > South Supervisor

if anyone have worked, Kindly assist about the logic.

Thanks,