Workflow - Select Specific User of Same Role to Approve?

Is it possible to select a specific user as an approver on a workflow, as opposed to a group?

Scénario
Purchase Receipt generated by a Stock User, a second Stock User checks the entry and Approves/Rejects.

There is no Stock Manager to approve this, because that is not the way our company works. One person creates the entry, another checks it. Both users are the same « level ».

Role based permissions only seem to allow Approvals/ Rejections by a user with a different role. The « Only if Creator » option doesn’t seem to be able to offer a way around this.

Is there a way to allow a specific user (from the right group) to be selected as the Approver?

Thanks,
Paul

In case anyone else is stuck on this, there is a setting in the Workflow transitions to stop self approval
image