As mentioned here NETOBSERV-2082, network names fields are populated when using UDN, and when using secondary interfaces.

In both cases they are visible as columns and filters, but only with UDN they are also a topology scope.

We could also enable them without UDN, when secondary interfaces (indexes) are configured in FLP. We could do that simply in the operator, by creating a new frontend feature (e.g "networkNames") and make it enabled either if UDN is enabled, or if FLP is configured with 2dary interfaces.

Also (perhaps a different task): an optimization can be done in FLP, to not populate "Primary" network name when neither UDN nor 2dary interfaces are configured.