PW module for hiding pages that don't match the user's name, under a certain parent page - currently hard coded parent name: visitenkarte

HideOtherUserPages

<?php

/**
 *
 *
 * ProcessWire 2.x
 * Copyright (C) 2010 by Ryan Cramer
 * Licensed under GNU/GPL v2, see LICENSE.TXT
 *
 * http://www.processwire.com
 * http://www.ryancramer.com
 *
 */

class HideOtherUserPages extends WireData implements Module {

    public static function getModuleInfo() {

        return array(
            'title' => 'HideOtherUserPages',
            'author' => 'Adrian Jones',
            'version' => 1,
            'singular' => true,
            'autoload' => true
            );
    }


    public function init() {
        // only add hook only if the render parameter is set
        // (as used by ProcessPageList)
        // or if superuser, also exit
        if(!isset($_GET['render']) || $this->user->isSuperuser()) return;
        $this->addHookAfter('ProcessPageList::execute', $this, 'pageListHiddenPages');

    }


    public function pageListHiddenPages(HookEvent $event){

        // make sure it's an ajax request
        if($this->config->ajax){
            // manipulate the json returned and remove any pages found from array
            $json = json_decode($event->return, true);
            foreach($json['children'] as $key => $child){
                $c = $this->pages->get($child['id']);
                if($c->parent->name != 'visitenkarte') continue;
                if($c->name != $this->user->name) unset($json['children'][$key]);
            }
            $json['children'] = array_values($json['children']);
            $event->return = json_encode($json);
        }

    }

}

you can also edit if($c->createdUser->id != $this->user->id) unset($json['children'][$key]); to
if($c->createdUser->id != $this->user->id) unset($json['children'][$key]);
this will show only those pages which a user has created.

to achieve this i used solution mentioned by adrian on processwire forum, he told me to add new permission 'Page-Edit-Created, and with this you can another module "Hideuneditablepages' with ,'hide other pages' module .
This will show only those pages that a user has created.