SRX100 - redirect traffic by protocol

Hi everyone,

Assume that my current configuration interface on SRX100:

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LAN : 192.168.1.1

DMZ : 10.0.0.1

ISP1 : 1.1.1.1    GW: 1.1.1.2

ISP2 : 2.2.2.1    GW:2.2.2.2

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I have start to create a load balacing over my 2 ISP link.

routing-options {
     static {
          route 0.0.0.0/0 {
               next-hop 1.1.1.2;
               qualified-next-hop 2.2.2.2;
          }
     }
}

This configuration is correct ?

Now, I would like to know how to redirect different services to ISP1 or ISP2.

For exemple, I want to redirect HTTP/HTTPS requests to the ISP1 link and VOIP requests to the ISP2 link.

Thank you in advance for your answers.