gistfile1.py

class ThisAdmin(admin.ModelAdmin):
    def queryset(self, request):
        """
        Filter the objects displayed in the change_list to only
        display those for the currently signed in user.
        """
        qs = super(ThisAdmin, self).queryset(request)
        if request.user.is_superuser:
            return qs
        return qs.filter(Q(owner=request.user) | Q(editors=request.user))