Is it possible to create invoice approval rule based on Approver's Role?

Summary:

I've been working on creating a new AP Invoice Approval rule in BPM that would check if the approver has a particular role, and, if not, reject the invoice. However, it doesn't seem to be the functionality of BPM, that is, the ability to add an IF condition based on the approver's role. Does anyone know if this is possible within the FinApInvoiceApproval Task?

Content (required):

I've checked through support docs and found a way to check for the Invoice Submitter's role, but not the destined approver's role. Also, I found a way to route invoice approvals to particular application role, but that's not the same as checking for the role of the destined approver.