Hi @jlhummel,

At this time, I don't believe this is a possibility in Canvas itself.  The self-enroll link is just one per course, with basically no section awareness.  As things are right now, you'd need to build/purchase some kind of front end to do registration and enrollment in the correct section instead of using the self-enroll feature.  Having self-enroll at the section level is an interesting idea though, and one you can submit to Instructure for review as a future Canvas enhancement.

-Chris