When mc is started normal (without administrative priviliges) and a copy operation is performed from one panel to the other panel in a restricted directory, mc asks to execute this operation with administrative priviliges.
If the source panel is an open archive file (e.g. rar) and you try to copy from this archive to a restricted directory, nothing happens.
It would be nice, if mc also asks in this cases to use administrative priviliges for the copy/move operation.