Wrapped exceptions

I am currently working with an application that wraps every exception in a
general exception. The problem is, there are some errors I can address
(configuration errors, user errors, etc) and some I cannot address (network
errors, database errors, etc). But they are all wrapped in the general
exception.

I would like to ACCEPT only on the wrapped exceptions I can address and
DENY the ones I cannot address. Can this be done simply through the log4j2
configuration files, or will I need to create a custom filter?

Robert Egan