<?php
return [
	// ...
	'modules' => [
		// ...
		'comments' => [
		    'class' => 'rmrevin\yii\module\Comments\Module',
		    'userIdentityClass' => 'app\models\User',
		    'useRbac' => true,
		]
	],
	// ...
];

<?php
use \rmrevin\yii\module\Comments\Permission;
use \rmrevin\yii\module\Comments\rbac\ItsMyComment;

$AuthManager = \Yii::$app->getAuthManager();
$ItsMyCommentRule = new ItsMyComment();

$AuthManager->add($ItsMyCommentRule);

$AuthManager->add(new \yii\rbac\Permission([
    'name' => Permission::CREATE,
    'description' => 'Can create own comments',
]));
$AuthManager->add(new \yii\rbac\Permission([
    'name' => Permission::UPDATE,
    'description' => 'Can update all comments',
]));
$AuthManager->add(new \yii\rbac\Permission([
    'name' => Permission::UPDATE_OWN,
    'ruleName' => $ItsMyCommentRule->name,
    'description' => 'Can update own comments',
]));
$AuthManager->add(new \yii\rbac\Permission([
    'name' => Permission::DELETE,
    'description' => 'Can delete all comments',
]));
$AuthManager->add(new \yii\rbac\Permission([
    'name' => Permission::DELETE_OWN,
    'ruleName' => $ItsMyCommentRule->name,
    'description' => 'Can delete own comments',
]));

<?php
// ...

use rmrevin\yii\module\Comments;

echo Comments\widgets\CommentListWidget::widget([
    'entity' => (string) 'photo-15', // type and id
]);