Sorry for the delay. There is a plug-in for Photoshop that allows you to import Photoshop Touch project files into Photoshop CS5 on a computer by transferring the file through a the Creative Cloud website (https://creative.adobe.com/) and importing with a special plug-in. If you sent out jpeg copy of a project from within PS Touch to somewhere you could import it on a computer into your Lightroom catalog that would work (via email would be the easiest), but its not natively setup to work with Lightroom.
Check out this doc that describes the workflow with Photoshop CS5.
Hope that helps,