How to completely get rid of indirect lighting for specific movable objects?

Hi Tim -

We have a situation where very bright samples are being created outside of a darkened room despite several attempts at volume tweaking. We have thousands of dynamic objects in this room, and many of them are referencing these bright samples.

Is there a way to force an area to not include any samples whatsoever? For example, a way to completely disable all samples from being generated except inside of LightmassImportanceVolumes or LightmassCharacterIndirectDetailVolumes?

Thanks,
Dave