Hi Thor,
Articulate Storyline and Articulate Presenter allow you to track a course either by the number of slides viewed or by one specific quiz (result slide). However, you may be able to track more than one SCO (shareable content object) in a single course, using any of the following unsupported methods. These articles refer to Presenter, but you should be able to to use the same techniques with Storyline.
Note: Articulate has not tested or verified the accuracy of the information provided in these articles. These methods are not supported by Articulate.
If you'd like a built-in feature to track multiple SCOs in a course, we welcome your feature requests.
If this isn't what you'd like to do, can you give me a little more information?
Thanks!