How to show/hide few methods to one client and few other methods to another client in Web Api

I have a Web Api say "Calculator". It has say methods Add,Subtract,Multiply,Divide. I wanted to make sure that only Add, Subtract methods will be visible to client when we handover them. And when I handover to another client I wanted to show only Multiply and Divide methods. Is it possible in Web Api 2.0?