Easy Question Why users see all tasks even not assigned to them

Easy Question Why users see all tasks even not assigned to them

Dear All,

I dont understand Why a user can see all tasks which is not assigned Him or Her.


I want my one of my user to see only own task not the other user's tasks


It is very basic but i dont understand i can not find this feature


everybody in my users can see other my user's tasks which are not related directly.


Help me out.I really can not understand this


Zoho projects do not support this????...