Hi Heath,
Unfortunately, we never got around to adding this feature before we decided to move the app to mature support. That being said if you or someone you work with is familiar with JavaScript, you could add that functionality in a self-hosted version. Another community member has customized their crowdsource app to do this and posted a sample here: Custom URL's · Issue #1 · Esri/storymap-crowdsource · GitHub (See the last comment in the thread for example).
Steve