How about (untested)

my ($me)=`net config`=~/^User name\s+(.*)$/m;
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to run net config, search it for the string User name, and grab the stuff from the other end of that line (which is put back into your variable). (The m modifier makes ^ and $ match the start and end of lines, rather than the start and end of strings.)

--
Tommy
Too stupid to live.
Too stubborn to die.