log4j: Route only subpackage to different appender

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN" monitorInterval="30">
	<Appenders>
		<Console name="ConsoleAppenderA" target="SYSTEM_OUT" follow="true">
			<PatternLayout pattern="mainlog>  %m%n%ex"/>
		</Console>

		<Console name="ConsoleAppenderB" target="SYSTEM_OUT" follow="true">
			<PatternLayout pattern="sublog>  %m%n%ex"/>
		</Console>
	</Appenders>
	<Loggers>
		<Logger name="com.example.demo" level="debug" >
			<AppenderRef ref="ConsoleAppenderA" />
		</Logger>

		<Logger name="com.example.demo.sub" level="debug" additivity="false">
			<AppenderRef ref="ConsoleAppenderB" />
		</Logger>

		<Root level="info">
			<AppenderRef ref="ConsoleAppender" />
		</Root>
	</Loggers>
</Configuration>