add the ability to listen in on certain network addresses

[jeremyp3]

Would it be possible to implement an option to listen only on certain networks of an interface. this is particularly useful for IPV6. i have a ULA network and a GUA network. I'd like ksmbd to listen only on my ULA network fd42:d1d2:cafe:cafe::/64 and not on my GUA ip 2001:db8:cafe:cafe::/64 and be accessible to the whole internet. in the meantime I'm going to use firewaling, but it would be useful if it were natively supported by ksmbd :)

Thanks !