Netscreen 25 port fowarding multiple external ips

Im trying to setup port forwarding on inbound request to mutiple
addresses .like so

Redirecting http requests from 30.199.190.180:80 255.255.255.255 to
http 10.1.1.5:80

Redirecting pop-3 requests from 30.199.190.180:110 255.255.255.255 to
pop-3 10.1.1.3:110

Redirecting smtp requests from 30.199.190.180:25 255.255.255.255 to
smtp 192.168.254.100:25

Redirecting ftp requests from 30.199.190.180 255.255.255.255 to ftp
10.1.1.2:21

Redirecting http requests from 30.199.190.179 255.255.255.255 to http
10.1.1.4:80

Redirecting Netmotion1 requests from 30.199.190.178 255.255.255.255 to
Netmotion1 192.168.100.32:5008


We have multiple external ips and since u can only put one ip from the
untrusted interface im yet from figure this out
please help

//dev