AppenderSkeleton substitute in Log4j2.17.

Hello Team,

We are using log4j 1.x in our project, it has custom appender for logging which leverages org.apache.log4j.AppenderSkeleton.
It uses Grid name and App name mapping for dumping app specific logs.

We have to upgrade log4j version to Log4j2. Hence we are looking for AppenderSkeleton substitute, which uses the same underlying architecture. We have already explored the available customized appender options [using @Plugin], but that is not feasible for us as our core framework is designed in such a way that we need to provide App name and Grid name in log4j.xml itself.

So to summarize we are looking forward for help on below points : 
1. Is there any way to add app name and grid name in Log4j2.xml ? 
2. Is the any AppenderSkeleton substitute, which uses the same underlying architecture ?

Any help on the above mentioned points will be highly appreciated.
 
Thanks,
Deepak Pareek