This config log all into all files, thats not what you try to do.
Add:
<category name="x.y.z"> <==== your package or log-category
<priority value="TRACE" />
<appender-ref ref="ABCWAR"/>
</category>
This should be before the <root> and remove the appender-ref from root, thats it.
If you want to have the JBoss classes in your logfile then you have to add a filter to the FILE appender that have AcceptOnMatch=false.
But this will be a performance and lock contention issue.
The reason is that the category is checked before the log statement is executed.
The appender filter is inside the file-write-sync-block and you will have locking contention in case of high traffic!
So if you only want to have a business logging of your app use the category.
In case of analyzing problems I would recommend to add the FILE appender to your category and use the server.log for this.