Hi,
It’s not possible to choose the approver at the moment you are sending the approval request.
You must define in the workflow a specific approver, a user group or to use the approval chain.
So regarding “For example, the approval request of purchase order A should be sent to manager 1 and the purchase order B to manager 2.”
I believe to achieve that you need to create two workflows with different conditions (for example, filter by Assigned User ID or any other field that might be different according with the approver) and then assign a specific approval for each workflow.
Based on the condition, system will know which approver should get the request.
Hope it helps.
