Hello aquadecor, try the following method from the developers website.
URI rejection and matching criteria
There are times when a page or a post has to be served always from WordPress. Given the URI (URI is the right word) of that post, it can be added to the url to reject textarea. Let’s go with an example. You have a special page that has not to be cache, let it to be under the URI “/special-page”. So, enter that URI in the text area without quotes. The matching criteria is “if the current URI starts with one of the specified, just skip the caching system”. Read the criteria, you can use the partial URI “/special” and the special page will be still rejected.
What about if I need to reject a page with URI “/special” but cache the page with URI “/special-page”? Simply write the URI to reject surrounded with double quotes: “/special”. Hyper Cache will match exactly that page.
Let me know if that helps you.