Creating Multiple Deployment Type for an Application

Suppose I have to create an Application with multiple configurations.

UAT Configuration - Application will be pointing to UAT Server.

PROD Configuration - Application will be pointing to PROD Server.

Now that I created the Application with two Deployment Types,

Deployment Type 1 - Pointing to UAT configuration.

Deployment Type 2 - Pointing to PROD Configuration.

How do I make the Deployment type understand whether the user/machine needs UAT or PROD configuration.

The PROD and UAT servers are related to the software level and we cannot identify it using the machine settings.