Automation rule were created by my manager who is project lead in the service desk project. I have created one more rule to override the default one "Comment updates reply status" and also am an site-admin & administrator for the project. So access permission is not a problem. Whenever I comment some ticket or close the ticket, I see only my manager name in the email. How to really over-ride with my name. Attaching few screenshot. 
The above shot is the rule created by me.
The above shot is the rule created by project lead.
Also I tried to remove all the rules, and kept only one rule, If i have like that then there are no email triggers happening. only if I left the project default user as intact then the email comes to my inbox but again with his name even if I edit any tickets.
