Hi there, I'm not familiar with the current iteration of Audition (which I last used when it was still called "Cool Edit Pro", lol), but I'd assume you could export each track as uncompressed audio file (i.e. WAV or AIFF) and then import these tracks into a Logic project.
If you're worried about synchronization of these audio stem files which may not start at the very beginning (i.e. 1st beat of the 1st bar), you could use a little trick: in the Audition project, insert a short audio sample with distinct transient (say, a click sound) right at the start of each track which doesn't start at 1.1.1.1 position. Then you can use these first transients to perfectly align exported audio in Logic (and delete them afterwards either destructively in Sample Editor or non-destructively by editing audio regions in Tracks view).