Make some task readonly

[Gert]

We have 1 scheduler where multiple users can create tasks.
In the database a task is created with a user_id. So we know which user created which task.
The user_id from the database is included in JSON and Kendo UI datasource.

How we achieve that a user can only modify(update, delete) his own tasks ? Tasks from other users have to be read-only.
The popup-window must open for all, but alle buttons must be disabled if not created by the user.

thx,
Gert

[Gert]

Solved with events : resizeEnd, moveEnd,....

resizeEnd: function(e) {
            if (e.event.userId != loggedOnUserID)
            {
                 e.preventDefault();
            }