Registered User Roles

Hi,
I am using a form plugin which enables me to create forms on a fly which then I can map it with registration fields as well.
Since I needed to customize the form to behave certain way, I hired a developer to do what I need. But it seems that the core of that form plugin has been changed to do just that and I can not use the plugin to create other forms since it is redirecting users to a URL that was set for that particular form.
I have been able to locate the code in the core that is responsible for this
which looks like this:

if( empty($errors) && @count($arf_errors) == 0){

            $_POST['arfentrycookie'] = 1;

			if($params['action'] == 'create'){

                if (apply_filters('arfcontinuetocreate', true, $_POST['form_id']) and !isset($arfcreatedentry[$_POST['form_id']]['entry_id']))

				{

					unset($_SESSION['vpb_captcha_code_'.$_POST['form_id']]);

                    $arfcreatedentry[$_POST['form_id']]['entry_id'] = $db_record->create( $_POST );

					$return["conf_method"] = "redirect";

					$return["entry_id"] = $arfcreatedentry[$_POST['form_id']]['entry_id'];

					$return["item_meta"] = $_POST['item_meta'];

					$return["org_name"] = slugify($_POST['item_meta'][83]);

					$return["return_url"] = get_permalink(110);

					 $loginusername = $_POST['item_meta'][132];
					 $loginpassword = $_POST['item_meta'][133];

					 $creds['user_login'] = $loginusername;

            		 $creds['user_password'] = $loginpassword;

            		 $creds['remember'] = true;

           			 $autologin_user = wp_signon( $creds, false );

					 $user = get_user_by('login', $loginusername);
        			 $user_id = $user->ID;

					 wp_set_current_user($user_id, $loginusername);
        			 wp_set_auth_cookie($user_id);
					mysql_query("insert into wp_usermeta(user_id,meta_key,meta_value) values('$user_id','org_slug','$loginusername')");

					echo json_encode($return);

					exit;

				}

            }

My questions are:
1- where in this code is being declared what/which role does the user have?
2- can I modify this code to declare which form number can it be applied to…? (like form #100)

Greatly appreciate any assistance I get get.

Regards,

Dave