Various video services at the same IP WAN same port.

  Hi, i need to public various video services at the same address, for example: (Wan) 200.x.x.x port: 1234  (map to) -> (lan) 192.168.1.10 port 1234                                                  (map to) -> (lan) 192.168.1.11 port 1234                                                  (map to) -> (lan) 192.168.1.12 port 1234 I think that's not posible, because when connecting to 200.x.x.x the device can't know the correct destination. Only work with 1 virtual IP (with same port). I thinking to make 1 vdom per service (sharing the ip wan : 200.x.x.x). Is posible? Which are the alternatives? Thanks

PS: FGT310B firmware v5.2.3,build670 (GA)