problem in using GRASS

[H Huang]

 I am a grass beginner. when I use it, I found following problem:
  
 When two users ( say user A and user B) use Grass4.0 at the same time, one user can kill another's X graphic drive(e.g. driver x0 has been started by user A. 
 Use grass command "d.mon stop=x0", user B can kill user A's driver x0).
    
 Can anyone help me?
    
 Thanks
 
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 	/*	Haishan Huang				*/
 	/*						*/
 	/*	LUTCHI Research Centre			*/
 	/*	Department of Computer studies		*/
 	/*	Loughborough University of Technology	*/
 	/*	Loughborough LE11 3TU			*/
 	/*	U.K.					*/
 	/*						*/
 	/*      Email : H.Huang at uk.ac.lut		*/
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