Hello,
According to the link below:
AppTrack log information is also contained in firewall logs so long as another AI component is enabled like AppFW or AppQoS. Typically, this is best leveraged by itself if you are not running another AppSecure component but want to still collect this information.
http://chimera.labs.oreilly.com/books/1234000001633/ch12.html#application_tracking
Do you have any of these features enabled on the FW?
Regards,
Rushi