BPM project

I am developing BPM project which have some roles and will be deployed for many organization. Problem: This project has some roles and will be deployed for a corporation and many branches company. Each branch has 2 departments equivalent 2 roles. We will add some users to that roles and want to grant each user belongs to one branch can be only manipulated with the tasks of that branch. Users belong to other branch cannot visible that task. Also, every user belong to Corporation will be able to view all task of branches. Do you have the solution for this problem ? Development Enviroment: - Jdeveloper [login to view URL] - Weblogic [login to view URL] - BPM & SOA [login to view URL]