disabling 3rd party image links etc. by usergroup

[snoopy5]

Hi

I need to disable specific image upload functions which are available outside of the ACP.

Currently, one usergroup can insert images from other sites by

• inserting the img tag
• just copy & paste that image
• Inserting an URL

With these 3 options, you break any kind of image upload restriction that you set in ACP. i.e. pixel width of images for a basic usergroup. So this needs to be addressed in my forum asap. Otherwise the whole control of image uploads by usergroup in ACP is worthless

How can I do this within the code, so that users of the standard usergroup can only upload images according to the ACP settings, but nothing else. No copy&paste, no url?

Or did I oversee something in the ACP?

Thanks in advance