ok this might help.

Create your camera and your model I used a tours just as a test. THen apply a planar projection to it.

Now in the channel box right click the projection centre X box and create an expression. set it to:

polyPlanarProj1.projectionCenterX = camera1.translateX;
polyPlanarProj1.projectionCenterY = camera1.translateY;
polyPlanarProj1.projectionCenterZ = camera1.translateZ;

replace the camera name and the projection names with yours. Now apply a texture to it and move the camera, you should see the texture moving based on where the camera is.

Hope that is some help

Alan