Domain-based instead of IP addresses load balancing in Vyatta

Question

Currently my company has 6 Internet lines (1 Lease line and 5 fiber lines). Only the lease line (eth1) has the static IP address. So, if I want to give users access to secured site (That check IP addresses e.g. Apple Distinguish Educators login), I have to direct the request to the lease line:

 rule 71 {
     description some.secured.site
     destination {
         address 52.43.56.77
     }
     inbound-interface eth0
     interface eth1 {
         weight 200
     }
     protocol all
 }

But, the website keeps changing its IP addresses.

Is there anyway I can do the same but with domain name as destination?

Thanks, Trinh