I am trying to create a special right in the helpdesk. Our internal customers will report incidents this way, now I want the user to only see the tickets he/she has created. So not "my tickets" but "created by".

This special right will have fewer rights than the normal helpdesk user.

I tried to duplicate the user and add a rule like this:
['|',('create_uid','=',user.id),('user_id','=',False)]

But it's not working.

Also tried: 

['|',('user_uid','=',user.id),('user_id','=',False)]

but then I can't even open the helpdesk        

Can someone please help me?