Monitoring traffice my spicific device / mac address

[detox]

I am eager to build and deploy a pfsense appliance.  I am not understanding how to monitor every appliance / mac address though.

If my home is set up as: cable  modem -> pfsense box -> router, how do I see and monitor every pc?

Or, should I remove the router and replace with a switch and access point?

Thanks for any input

[hda]

Yes. MoDem(bridge) <-> WAN-NIC-pfSensebox-LAN-NIC <-> Switch <-> { hosts() }

[detox]

hda -

Thank you!  I will set it up per your diagram.  My pfsense box only has two nic cards ( 1 wan 1 lan)  If I add a third one (ore more) each of these would be their own network and would not 'talk' with the others correct?

[hda]

Yes. Another NIC, another LAN. You could manage with pfSense how LAN's communicate or not.