Report that combines signature data to the course

Summary

I'd like to create a report that combines data collected from a signature to the course that initiated the signature

Content

I'd like to create a report that combines data collected from a signature to the course that initiated the signature.  In other words:

 

I have a course and have associated a signature with it (I plan to have several courses use the same signature).  I can see how to report the data from the signature but I can't seem to figure out how to associate that with the course that the learner was in when the signature data was collected.