Help Adding User to Disk Space By Computer Report

I have an existing report (sql below) to easily run reports based on amount of free disk space (I probably got the report from Connect).  It works great, except I'd love to have the primary user listed on the report.

Can some SQL pro help me modify the report to also have that?  Right now I have to look up the computer names one by one to correlate them to user's almost out of space (thanks windows update!).

Thank you!

I can't add code snippet withou an error, so will attach as text file