Allow only pictures from some imagehoster

[BustedFly]

Hi,
with the [img] you can post pictures from every source.
I only want to allow pictures from imageshack and some other imagehosters and I have no idea how I can ban all the other hosters.

The other hosters should only be linked, but the image should not be shown.

BustedFly

[BustedFly]

Push! Does anybody know an answer?

[Videx]

I've never heard of any such mod. You can try requesting it in the proper forum.