how to block/ disable initiator to edit the tasks for which he is not owner or member of the task ?

[prasobhraj]

Hi,

How to block the functionality where initiator of the workflow can do all tasks even he is not an owner or a group member of the task in alfresco community edition. I have seen the answer for this for enterprise edition , but please help me for the same on alfresco community edition

Thanks.

[prasobhraj]

Can anyone help me out for this?