Create a White Label eLearning Wordpress Site

I am looking to white label my video elearning content. I'd like to offer a custom banner to anyone without duplicating the content on the rest of the website. The URL will be different for every white-labeled customer. I use Wordpress to manage the body content. ## Deliverables Basically, I am looking for a way of changing the banner on a wordpress site for as many times as I want without duplicating content. I don't know how it will be done, but I think it's not so hard with PHP. Example [login to view URL] (will have "a"s banner) [login to view URL] (will have "b"s banner)