In the above link, click the "Edit Text" button, Cute Editor will show up.

 

Then you can click the insert image button to insert images.

 

In this example, we prefix the current user role to the image file name.

 

The current user role is "guest" if you haven't logged in the site.

 
If you want to upload an image whose name is "someImage.gif", CuteEditor will rename it to "guest_someImage.gif" in the fly.

Also the users in the guest group can only view images whose name is start with "guest_"...

Keep me posted