Allow only some wan IP's access through a given port

[Hanzo007]

I have a port that i need to forward, but want only few (5) WAN IPs to access this port, how can i do this?
i have tried making a NAT rule, but the option that are available is to make a single host access the port and not multiply WANs.

Could i perhaps. make 5 duplicated NAT rules with different names and different "single host" IPs but with same destination ip and port ip?

will this work or will it be overruled by the first rule?

[Hanzo007]

I got it to work, by adding a Alias with all the WAN IPs that i need and then created a NAT rule with the alias as a single host/aslias. :)