Hello I want you to help me block the catnet and programs to change the study of the Mac in the network
Use the hot spot 
The short answer is that it’s impossible to prevent people from using netcut.
The long answer is in threads where other people have asked that question.
Try This Solution man
http://forum.mikrotik.com/t/no-netcut-in-mikrotik-any-more-easy-solution/45725/1