AME-- How to restrict requisition requester from showing up in Approval group

 AME-- How to restrict requisition requester from showing up in Approval group:

I have a combination list creation type rule.

As a first step requisition goes to Supervisor of requester .

In the next step, it goes to a static group A of three members.

One of the member has created a requisition & is a requester.

I dont want the requester to show in the approval list.

He should be some one who submits but not some one who approves.

Is there an attribute to prevent them from showing up in the list of approvers?

AJ