You can not intercept the final resultset. The first two are the results from the sources where a translator is involved, for the final results there is no involvement of the translator. If you want to intercept that you need to use some kind of SPY driver over the TEIID JDBC Driver.
It all comes down to what you are trying to do. Teiid has support for masking and row based security that may be applicable here.
There is also the path of introducing another vdb that simply points to the existing vdb and uses the Teiid translator - via a delegating translator. Most constructs (but not all) would be pushed down and you would have a later interception point.
Thanks Steven, creating a VDB on top of the existing VDB, worked.I am able to intercept the final resultset using the delegating translator.