Is there a way to monitor an incoming call that are routed thru a call queue rather than the direct line?

As about accepting calls, you can check dndStatus in Presence API (this flag is set to "DoNotAcceptDepartmentCalls" if an extension don't accept call queue calls).

As about monitoring, the only way today is to match phone number from call notification. If it is a queue number, than the call came through Call Queue. But you will need to monitor individual queue agents anyway,