following is the view showing custom tasks by a category, click here for another view for logged in users by which user can add,edit,delete,complete their own tasks. 

Custom tasks in a category - text changeable

# Completed Subject Description Date
1 Published custom task1 In this menu item, custom tasks shown under a category, logged in users can only mark complete/incomplete. 2014-06-16
2 Published custom task2 Another menu item page can be created where each user can add, edit, delete, complete their own tasks. 2014-06-16
3 Published task3 buy now 2014-06-16
4 Published normal task1 desc 2014-06-16