When trying to filter specific event for SQL Server, some elements like EventClass are not available in the SQL Template.
Furthermore, it is not possible to filter them from the Event Audit location for a specific user.
Currently Change Auditor can only apply 1 SQL Template per Agent which do not allow for multiple unique traces/filters (per database for example).
Regarding the EventClass filter, Change Auditor allows for trace filtering in similar manner as SQL Server Profiler.
While the EventClass info is contained in the audit data details, it does not appear to have any post-filter available at this time.