When i am using the logged in user function, it is giving me "administrator

Besides emphasizing on the importance of what Jed suggested I'd like to mention that as discussed here forum.appian.com/.../e-83588 it's important that you review the documentation of this function forum.appian.com/.../Scripting_Functions

The loggedinuser() consistently works if you take in consideration the documented behavior:

- If there is no user context, such as when used in an expression in an unattended node, it returns a null value.
- It is only applicable in situations where there is a user context pre-populated for the activity, such as when executing a Quick Task or a subsequent activity-chained task.

---> As long as you don't un-check the "Refresh default values every time the task form is viewed" checkbox which comes enabled by default for quick tasks.

- In task forms that do not follow an activity-chained flow you need to select the "Refresh default values every time the task form is viewed" checkbox on the Other tab of the activity, otherwise will return "Administrator"

Very good to know. Thanks for sharing!

Very good to know. Thanks for sharing!