This is currently possible with customization only, but something like that is also on todo list so will be available in future.

For frontend property submission customization can be added to:
templates\bootstrap2-responsive\editproperty.php, lines around 380.
Most simple example can be found here:
http://www.w3schools.com/tags/att_input_required.asp

Andif you want for specific ID, then you can use something like this:
<?php echo ($val_option['id']==5)?'required':''; ?>