outbound traffic for specific url by using specific IP

Ok...I get it works but not exactly what I want. I still want to know whether I can get help from here.

Here is what I have done but only for https traffic. I have two VS. VS1 - all outbound traffic for all pool members by using IP1 on snat1. VS2 - all outbound https traffic for all pool members by using IP2 on snat2. All pool member are using F5 to be the default gateway.

VS1 setup as below.

1. VS type - performance layer4.
2. Source - 0.0.0.0/0.
3. Destination - network - 0.0.0.0/0.0.0.0 and all ports.
4. snat - using snat1.
5. no pool members.

VS2 set up as below.

1. VS type - performance layer4.
2. source - 10.100.8.0/22 - this is my DMZ where all pool members are.
3. Destination - network - 0.0.0.0/0.0.0.0 and port - 443 .
4. snat - using snat2.
5. no pool members.

Therefore, all https outbound traffic from pool members are using snat2 - IP2. Others outbound traffic from pool members are using snat1 - IP1.

I want to know how to set up ONLY specific URL like https://www.yahoo.com outbound traffic by using snat2 and the others are using snat1 (including others URL https).