If we wanted to track the movements/actions of specific end-users (not CMS users), is is possible to build something to track and report on that level of detail? Assuming we get someone (not me) with the technical capability to do so?

I'm trying to help a client understand the limits of AEM, but I'm not 100% sure I know what all of these pieces are or how they fit together. Please correct/help me fill in the gaps!  CQ* is the series of content management systems that are part of AEM. CQ6.* is the latest version.What are the defa...