How the ideal concept for View of multi level user in web development

I have a question, how the standart for ideal organization view for multiple user on an application? For example, in web development, we have 3 level users, as administrator, super user, and the lowest is user. 3 users have different view on web page. is the right way if we use one file to handle 3 users? How if we have more then 3 levels? is there another way?

Need help please...