> Does your product support logins?
WebSite-Watcher supports logins for many pages.
Simplest way is when a page can save login information in a cookie. In that case, open the page in a browser tab of WebSite-Watcher and login to the page. This will write a cookie that will then be used when checking bookmarks.
If it's not possible to save login information permanently in a cookie, then you can try to record an Internet Explorer Macro that performs the login.