If you apply a 1D or 3D LUT for display, then you can modify the exposure and contrast in the usual way.
However if you apply a colour transform to an image view or the broadcast monitor, then you cannot adjust the exposure and contrast interactively unless there is a dynamic ExposureContrast operator in the CTF file. In this case, the exposure and contrast values defined in the CTF file are not used. Instead, the values set in the Image Display options are used.