How does View "My Groups Requisitions" get populated in i-Procurement?

 Hi,

In the "Requisitions" tab in the iProcurement authorization is a menu containing two options:

All my requisitions

My groups requisitions

When selecting the second option, myself being a buyer in Purchasing will see all requisitions ever created in our system. Our users, who are not defined as buyers only see their own list of requisitions when they chosse this second option.

This means there is no difference between both selections for most of our users.

Right now I would like to know if there is a way to change the selection triggered by picking the option "My groups requisitions" in such a way that people from the same eg.department can see each others requisitions, and possibly even adjust them.