In Abiquo you can configure multiple network interfaces per hypervisor. You must tag each interface with a network service type to enable and identify it in Abiquo. You can then assign network service types to your external, public and unmanaged VLANs to control the interface and therefore, the network used.
Network service types page
To manage network service types for your datacenter, go to Infrastructure → Private → select datacenter → Network → Network service types