thank you Mowaffak for your help. but wher I put the .htaccess file in the module or in root folder ?? and what is the apropriate format to save the code in .htaccess.
first: can I allow spesific contry to access to one module and refuse others?? second: is ther any way to refuse duplicate registration from the same IP ? and the page will be reloaded to a spesific module ?