Hi @azildav8, 

Open the text area control, under the presentation tab expand advanced presentation options. 

Add a class under cell read write and cell read only classes area, make sure that the class names should be the same. 

Save the section rule.

Now open the UserWorkForm and add the below code under script tags      $('.restrictcopy').bind("cut copy paste",function(e) {      e.preventDefault();  });

Here I have named the css class as restrictcopy in my text area control and have used the same in the above script.