How to enable multiple ports for different applications developed in thingworx, like IIS server.

I want multiple applications to run on multiple ports so that the congestion will be less. Now, I have 3 different applications and I am giving the post number of Tomcat( Thingworx) in the REST API url which increases the load on that port. So, I want thingworx to work as IIS server which helps in running different applications in differnet ports.
Thanks in advance