I tried to place the lights at the ccamera position, it basicly works but as I expected a lot of objects which should throw shadows are clipped away and another problem is, that I can´t set view.depth to a value bigger than clip_far which makes everything black if I don´t have a wall directly in front of the camera.
But already due to the missing shadows this isn´t really a good solution.

Nice would also be a flag for views like "NOCAST" to prevent objects from beeing rendered in the shadow view which are not meant to recieve a shadow.