[ваый]

<input type="text" id="filter-input"  value=""/><br/>
<table class="table-class">
<tr>
    <th>Username</th><th>Adress</th><th>Acess</th>
</tr>
<tr>
    <td>Вася</td><td>Москва</td><td>Read</td>
</tr>
<tr>
   <td>Лёша</td><td>Питер</td><td>Write</td>
</tr>
</table>

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script>
var filter = $("#filter-input");
filter.keyup(function(e) {
    var niddle = $(this).val();
    $('.table-class tr:not(:first)').filter(function() {
        if (!$(this).find('td:eq(1)').is(':contains("' + niddle + '")')) {
            return true;
        }
        else {
            $(this).show();
            return false;
        }
    }).hide();
});
</script>