How to redirect domain name to a specific instance of a single Liferay Application on AWS

I just installed the BitNami AMI on Amazon Web Services. I created multiple instances in Liferay 6.1 to host multiple websites. Each website has a separate domain name.

Question: How can I access the additional domains?

When I go to my Liferay application the URL looks like xxx.bitnamiapp.com/liferay and points to the primary Liferay instance.

I have no idea how to access the other ones.

Thanks.