Add a Label to a Ticket during creation by specific users (or user group)

vjpaddy

I want to understand if the following is possible. 

JIRA software - on-prem, 7.*

I want to be able to auto assign a specific label when new tickets are created. I know that I could set up a post function to do this bit.

Question is - Can the above post-function be controlled such that tickets created by a subset of users or a specific user group alone is tagged with a label ? 

For e.g. If I have Tom, Dick & Harry, where Tom & Dick are part of Team A, Harry is part of Team B. When Tom & Dick create a ticket, I want it auto labelled with "TeamA".

Thanks in advance.

vjpaddy

Thank you both. Should have clarified before. I am looking for an option without involving plug-ins/scriptrunner as the jira instance is owned by the Customer and such changes are hard to materialise.

 

Any possibility to achieve this purely by using transition conditions, triggers, and post functions ? i.e. if ticket is created by a user in Group X, then add this label ?