I've got a bunch of files I've worked on in Adobe Audition (that's the .ses file format), and want to switch to Logic Pro (which uses .iso)... I'm wondering whether there is any way to go about converting my old projects from .ses to .iso — Any Ideas?

hm...

you may just have to do it manually 

i don't know of any real "project" converters unless it's a built in option within the program.  i'm looking through audition, and i'm not seeing anything like that ...

sry

Most multi-track recording/sequencer software uses unique, proprietary formats for saving their files - so as far as I'm aware this is impossible.