multiple users & views

I’m trying to use Groups plugin in conjunction with WooCommerce. I have talked to the commerce people and they do not think what I would like to do is possible, and told me to post in the groups forum.

We are not using this as a traditional shopping cart.

so for example:

-You have a company.
-In this company there are 3 departments.
-Each department has a department manager.
-In each department there are many users(customers?).
-The users should be able to sign in and only see the products for their department, and order/pay for these items.
-The department manager should be able to login, and see and approve any and all orders placed by his department, but NOT see any orders placed from another department.

Right now I am having a problem trying to get the last point to work.
I have already set up users, and roles, and have different products showing up for the different departments.
HOWEVER when you login to the back end you see ALL the orders placed by every department. I would like the department manager to only see the orders placed by HIS department.
Is this possible?

http://wordpress.org/extend/plugins/groups/