How to set up the Tags in the editor to select different controllers to render?

Hello everyone,

I have a page type and I would like the instances of it to have different views/rendered differently.

As far as I understand I can do it by creating a several controllers for the page type and using TemplateDescriptor with specific TAG.

I know that I can select specific controller while making a call from a view to a partial view, but i need to set the tag somewhere on the page instance.

My question is, how can I specify at the time of page type instance creation which controller it should use for the rendering?

One way, I guess, it to create DisplayOptionsInitializationModule. But in this way all the page type instances will have those options. 

Thank you for any hints and suggestions!

HF