@TechNetwork1 you must have unbound set to listen on all addresses.. Guess that would mean vips as well.
You normally would have to do nothing.. There is no IP that needs to go into the general setup, unless you wanting unbound to forward to something..
And dhcp would default to handing out the IP of the interface its enabled on.. Out of the box there really is nothing to touch here.
So say you had lan 192.168.1.1/24 on pfsense, and opt1 network as say 192.168.2.1/24.. If you dhcp server on lan would hand out the 192.168.1.1 to devices on that network, and opt1 dhcpd would hand ot 192.168.2.1 to its dhcp clients.
If your filtering then everyone would be filtered.