I know this is a year old, but I just want to thank you for your help, Angelo! I am very new to Premiere and video editing in general and this was a huge help. I have been looking everywhere for this answer!
To others who are trying to edit audio from a multi camera sequence: Right click on your audio and click “Unlink,” then right click on it again and click “Render and Replace.” THEN you can right click on it and click “Edit Clip in Adobe Audition.” I was starting to think this wasn’t possible!