If so, the next single-line resource using awk might provide a useful template.
svn log -v -r{2009-05-21}:HEAD | awk '/^r[0-9]+ / {user=$3} /yms_web/ {if (user=="george") {print $2}}' | sort | uniq
You can add this to the list of useful command line svn examples .
Or use the XML output (-xml) of the svn log and the Xslt processor.