Procurement for Multiple Company Codes

H

Our busieness requirement is like this:

We have requisitioners (Users) who sit in one plant (of one company code). He is the employee of this company code.

We have 4 other comany codes with a plant under each of them. Each of these plants have their specific purchasing organization and buyer (purchase group). Only requisitioners siitting in this company code can raise shopping cart on behalf of all users of various company codes.

In EBP, can the requisitioner raise a shoppinng cart for a user in other company codes?

If I assign the attribute Company Code to the user will system permit requisitner to select from any of the 5 comany codes?

How does system work? What should my organization structure look like. And what attributes and wher?

Regards

J