i finally knows hot to do it :)
first i would to say perl is great language and all perl people are helpful and iam going to learn , learn and learn GOD willing
here is the code to make the whole task

#!/usr/bin/perl -w

use strict;

print " please enter the domain name: ";

my  $targetdomain = <STDIN>;

my $susdate = `date -u "+%m/%d/%Y %H:%M"`;
my $char = "This Domain is Suspended at ";
chomp $targetdomain;

my  $file = "/home/blackice/hello";

rename $file, "$file.bak" or die "Can't rename file '$file': $!\n";

open my $in, '<', "$file.bak" or die "Can't read file '$file': $!\n";
open my $out, '>', $file or die "Can't write file '$file': $!\n";

my $comment = 0;
my $block   = 0;
while(<$in>) {
    if (/^zone\s+"$targetdomain"/) {          
    print $out '// '    . $char;
    print $out ': ' . $susdate;    
    $comment++;
        $block += () = /(\{)/g;            
    print $out '// '.$_; next;
    }
    if($comment) {        
    $block += () = /(\{)/g;
        s!^!// ! if $comment or $block;
        $block -= () = /(\})/g;
        $comment = 0 unless $block;  
    }
    print $out $_;
}
[download]

Thanks for all