Workflow Setup Question

Has anyone been able to configure workflow using the AWE where there are multiple steps and the second step's list of approvers is based on who approves the first step? i.e. We want to have the same list of approvers for Step 1 and Step 2 but if they approve for Step 1 they shouldn't be listed as an approver for Step 2. My understanding is that when the transaction is submitted the system generates approvers for all steps and never goes back to update the approver list once a step is completed.