gistfile1.php

<?php
$result = array();
$ip_args = array();
foreach ((array) $array as $key) {
    $ip_args[$key['ip']][] = $key;
}
foreach ($ip_args as $key) {
    if (count($key) < 5) continue;
    foreach ($key as $key => $value) {
        $result[] = $value;
    }
}