Extend application User_Model with module-specific subclass

In kohana 2.3.4 system load first application, after modules and system. I want to extends User_Model in application with User_Model in modules. How to do that?

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Kohana loads:

1. application
2. modules
3. system

I want to extend User_Model in applicati开发者_如何学运维on, with User_Model in modules.

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I think that you can't extends user_model (application) with user_model (modules), but you can use another name for your model then extends the user_model.