point_push with filter_name?
ah, I'd like it so much but I can't make it happen 
Nope. It doesn't work that way.
Try a spherical trigger_push toward a target at its center with a negative force value.
note that sphere triggers take a lot of brush faces with count to the total face limit, so if your map is big it can be pushed over the limit and not work. If your point push is meant to move only certain objects, disable the motion of all others if possible
what I have now is a series of trigger_push, arranged to the shape of a sphere.
but maybe by "spherical" you meant a single spherical brush right... never tried that!
ok, the spherical brush with target on the center doesn't work.
I can point at an info_target but the direction is only one from each point of the sphere.
I'll stick with multiple trigger_push, each with its direction
you could experiment with trigger_catapult, though it has an arc-like trajectory, the right numbers can make a bee-line to the target at any given angle