Finetuning FindBugs ant task in Eclipse

Within eclipse I am able to define detector ids and bug categories to be reported from the preference page.

I can't find anything like that for the FindBugs ant task in the FindBugs docs or using autocomplete inside the Eclipse ant editor.

The things I can adjust are the effort and the report level.

Is adjusting the detectors and categories an undocumented or a missing feature or have I missed something? And how is it solved in the FindBugs Eclipse plugin?