Log4j - display logger.debug(...) from class to only a specific log file

Question

I want logger.debug statement from one class (org.myorg.MyClass) to go to only one log file (logY.log, which is appender A1) and not to show in logX.log. With configuration below, logger.debug from org.myorg.MyClass is now shoing in both logX.log and logY.log.
What is the least amount of change (this is maintenance code) that can be done in the following log4j.properties to show logger.debug("aaa") from org.myorg.MyClass only in logY.log (appender A1) and not show in logX.log?
Following is log4j.properties:
log4j.rootLogger = DEBUG, stdout
log4j.appender.stdout=org.apache.log4j.RollingFileAppender
log4j.appender.stdout.File=${pathVariable}/logX.log
log4j.logger.org.myorg.MyClass=DEBUG, A1
log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.File= ${pathVariable}/logY.log
log4j.rootLogger = DEBUG, stdout
log4j.appender.stdout=org.apache.log4j.RollingFileAppender
log4j.appender.stdout.File=${pathVariable}/logX.log
log4j.logger.org.myorg.MyClass=DEBUG, A1
log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.File= ${pathVariable}/logY.log
...

Answer 1

What have you done so far?
What kind of approach are you going to take (aside from asking others to do it all for you)?
Have you written the algorithm in psuedo-code? If so, can we see it? We might be able to give you a few pointers.