Four years later and this is still not supported?

I agree. This isn't acceptable. 

So you think this is acceptable:


$("#myform").kendoValidator({
     rules: {
         custom: function(input) {
             // Only "Tom" will be a valid value for the FirstName input
             return input.is("[name=firstname]") && input.val() === "Tom";
         }
     }
});

First off, wouldn't that mean that every field that's not named "firstname" will be seen as invalid? Also, this is a bad copout. I mean, look at wijmo's:

$('#ConfirmPassword').rules("add", { equalTo: "#Password", messages: { equalTo: "Passwords must match." } });

That's a lot easier. And Wijmo didn't say "these are application-specific" and can be accomplished "easily" by jumping through ridiculous hoops in non-intuitive manners. ALL of these should be strongly considered for inclusion. Great suggestions, Amol.