General help

Thank you for your response but I think that I couldn't explain my question well which my have caused some confusion What I wanted to say is that a student may give
his account to another one to do many things so I want to restrict the log in for each student to log in from only his device and to stick his device MAC address to his account I didn't mean that all students log from one MAC address I want enforce each student to log in from his account only
sorry for the inconvenience
thanks for your patience