How to set access to particular Origin from Node.js Server

I have script tags and an iframe embedded in client side HTML pages accessing my server. I only want particular clients to be able to access my server.

There is CORS which is used for GET or POST requests made with AJAX, like Response.Headers.Add("Access-Control-Allow-Origin", "www.abc.com"); I want similar implementation at my Server Side.

The web server is created using Node.js.
Please provide some inputs.