Selecting a template (or a module) based on the domain

Hello

I would like to know how could I do to dynamicaly select a page template based on the domain name.
I am using two domain with the same web architecture, and for a maintenance purpose I don't want to duplicate the root.

I there a way to select the page template or a way to include a module or another depending on the domain name?

abc.com -> Template 1
XYZ.com -> Template 2

Thank's for your help