After alot of searching, I found this:

http://log4perl.sourceforge.net/releases/Log-Log4perl/docs/html/Log/Log4perl/Appender/File.html

So, for the next person who runs into this issue. This is how you change the file in an appender at run time:

Log::Log4perl->appender_by_name('FILE')->file_switch('test2.log');
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