I am not sure if I understand your problem.

If you make your selector like this:

my $selector = sub { $_[0] eq $whatever };
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Then you can call it with any object as $selector->($object) (parentheses - not curly braces to call it!) and it will either use the built-in eq or the overloaded version. As far as I understand you that is what you want which is why I probably don't understand you...

But as an aside you can get a reference to the overloading method with overload::Method, so if you really wanted you could to something like (for the "eq"-case)

my $selector = sub {
                     my($obj)=@_;
                     my $code_ref = overload::Method($obj, "eq");
                     if($code_ref) { # $obj overloads "eq"
                        # call the overloading-implementation
                        return $code_ref->($obj, $whatever); 
                     else {  # no overloading -do something else
                        return $obj eq $whatever;
                     }               
                   };
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