Is it possible to have Automation Workflow with an Approval Rule

Hi, I'm new to using Active Roles Workflows. Trying to automate a process via the AR workflow policies. Currently when a user is disabled via an external workflow, they are not removed from certain groups due to how we have defined specific SOPs related to the groups in question. During periodic reviews, we review, record, and approve removing disabled users from certain groups. I want to set up an "Automation Workflow" process that uses an "Approval Rule" similar to a "Workflow Definition", but I don't see how this is possible. Has anyone been able to figure out how to accomplish that? 

thanks