Yes you can:
<cfscript>
app = 'YOUR_APPLICATION_NAME';
sessiontracker = createObject("java","coldfusion.runtime.SessionTracker");
sessionCollection = sessionTracker.getSessionCollection(app);
structEach(sessionCollection, function(k,v){
writeDump(sessionCollection[k]);
});
</cfscript>
This script basically lists all the session objects for a given application on your server. You can change it to your needs to find out the relevant session based on the keys you put in your session.
thisSession = sessionCollection[k];
//loop through thisSession keys
I do not have a working CF box with me now to test this to perfection; but I believe you will be in the right direction.