When you create a workflow you can select to create a new workflow task and history lists associated to it .
you can configure permissions to list to show only show items created by me or .
you can use below steps : to break impersonation and add custom permission to item when created .
http://community.spiceworks.com/how_to/66248-restrict-a-sharepoint-task-to-its-assigned-user-group
Thanks for reply
But Impersonation step is not allowed in sharepoint workflow 2013 and configuring permission to task list is not restrict user from editing the task, he can get edit form from workflow detail page on which all task mentioned for the current workflow applied to that list.
Hi,
Please activate the "Workflows can use app permissions" feature and use App Step to achieve it.
The following blog for your reference:
http://summit7systems.com/app-step-or-impersonation-step-in-sharepoint-designer-2013/
We can also create a SharePoint 2010 workflow in SharePoint 2013 using SharePoint designer 2013.
Best Regards