Depending on how you wish to control illumination, Clarisse offers many ways to deal with light linking. Indeed, Light linking can be achieved:
In this example the blue light has a geometry group that references the sphere whereas the red one has the box. In this scenario, the blue light is only occluded by the sphere and the red light only by the box. In the next example, the same scene without light linking. Note how the objects cast each 2 shadows.