How can I make authorization with database role in MVC?

Question

How can I authorize one of my controller only for the user in England.

 

For example: My database is like that.

DatabaseA (Id, Name, Notes, Country ).

 

In my databaseA_controller, there is one function (eg.Search).

I want to allow this 'search' feature for only the User who is in England.

 

I am using MVC5 and if possible, I want the reference with entity framework in MVC5. 

Kindly let me know if you have idea to do. Thank you for viewing my question.