The short answer is no, to assign a User Function to any User it must be done in the Scilife Settings section of Scilife. However, you will always create User Functions in the designated area in the Training Module.
Also, check these articles for a better understanding of how to manage User Functions:
Relevant for: Administrators / Managers / Regular Users.
Please note: Managers and Regular Users will only be able to manage User Functions to Users if they have been configured to be allowed to create/edit/delete users in MANAGE > Scilife Settings > Permission Settings.