I'm sorry for being basic in writing this question. I think the details have been covered though.
What's happening here is, two separate networks are being brought into an isolated area over a microwave radio connection. I may need to move the Layer 3 for these isolated devices to be on their side of the microwave connection (the far side).
How will I have a single Layer 3 switch on the far side of the microwave connection, be able to participate in OSPF areas for both segregated networks, and not break anything. The networks are merged at the Layer 2 switches that connect to the microwave at both ends. I use trunks and VLANs to re-separate the traffic here, but am lost about what to do with Layer 3/OSPF.
NET A (10.142.x.x) NET A OSPF AREA 7 OSPF AREA 7 L2 SWITCH (to) MICROWAVE RADIO (to) L2 SWITCH NET B (10.143.x.x) NET B OSPF AREA 107 OSPF AREA 107