Create new task screen looks different between users

[Lilly]

I have 2 users: one user is administrator and the other is in the developers group. when the admin user tries to create a new task the actual screen he sees is different then the screen the user in the developers group. The administrator has fields such as Assignee that doesn't exist for the developer.

[Geoffrey Laparra]

Hello,

This has to come from the Permission scheme used by the project.
To check this, go to Administration/Projects and clic on the project your having this issue.
On the left pane you should clic on Permissions
image2015-11-19 10:19:22.png 
Then check the *Assign Issues* permission
It certainly has the Administrator role but not the developer role in it.