The Load Balancer can be made to balance multiple SSL sites, in several ways. The simplest way to do this is just run the different sites on unique ports (the standard SSL port for websites is 443)
If you are using the Zeus Web Server v4, you can also keep all the sites on the one SSL port. For this, you will however require more traffic IP addresses - each SSL site will need it's own unique pair of IP addresses (this is a requirement of SSL, which needs a way to tell the sites apart). The Load Balancer manual contains the full details of how to set up this configuration.