Captivate 12 - Best Practices for One Training w/Multiple Depts

I am creating a training for a client who is using the content with three learner groups that work in different segments of the business. They wanted a "choose your own adventure" slide where the learner can select the segment in which they work. Based on their selection, all content that comes after is customized to their segment. This is fine - I built it this way, and it all works. 

We've begun to discuss edge case scenarios where someone may switch from one segment of the business to another. In their new role, they'd need to retake the training to get the information specific to their segment. My question is... how would this work? The company does not want to reset the user's registration and lose access to their past historical data. Is that possible? If not, should I break the training into three separate trainings for each of the segments, so that if they move from one segment to another, there is a new training they can take without resetting progress?