System notification for user allocated to doctype

I am working on erpnext v13.36.2 and I have multi company on it
1- I Want when i assign a doctype to a user a notification appear for this user.
2- I want when i create a sales invoice a notification appear for the account manager for the company that sales invoice created on it only .I created new notification for account manager and select the sales invoice at document type when it new but the notification appear for account manager in all companys
Any help on this …