OSPF route filtering for a specific source

Hello everyone,

I am working on an OSPF lab. So, I have my client router, my own router, and my F5 in an OSPF area. I would like to filter the routes the client router announces. I mean, if the client router announces routes it is not supposed to have, the F5 just won't add them in its routing table. I made it work on Cisco (for my own router), using this tutorial: http://www.my-ccie.com/2011/08/23/ccie-rs/ospf-filtering-routes-from-a-specfic-source/

Using the F5, I tried to use the same method under imish:

access-list 1 permit $client_router_IP

ip prefix-list CLIENT_NET permit $client_ip_range

    route-map Filter permit 10
            match ip address prefix-list CLIENT_NET
            match ip next-hop 1

    route-map Filter deny 90
            match ip address any

    router ospf 100
            distribute-list Filter in

But is doesn't seem to work... Does anyone know how to make it work? Thank you very much.