Automatically set list item permission, after new item is created

Question

We have a SharePoint Team Site (WSS 3.0 not MOSS), that includes Tasks list to records every tasks related to a project. Here's the scenario.

Users :

• List item
• Supervisor1
• TeamMember1
• TeamMember2
• TeamMember3

How do we set the permission settings so that

• Every users (Supervisor and team members) can see any tasks.
• Supervisors can edit any tasks
• Team members can only edit their own tasks (tasks that were assigned to them, or created by them)

I was unable to achieve the intended results using standard WSS permission settings, without resorting to manual permission settings on each item in the list. I'm imagining that the automatic solution has to be accomplish using some sort of workflow or trigger.

Answer 1

you do not need any workflow or event handlers ( still you can use them for your purpos but they will slow down the performance if you will be having a lot of items)

go to setting --> list settings click on Advanced Settings

in Item-level Permissions in read access select all items and in the same place in Edit access select only their own

and in permissions give list members a contributer role

for the suppervisor you can give him higher permission i think designer will work, or simply you can give him full controle on the list