If you have created a default user (DFTUSR) for LANSA Web, all users who pass the Web Server validation will use the anonymous user profile to access the LANSA System.
Alternatively if you are using individual user profiles in the Web Server validation list, you can map them to specific IBM i user profiles. The mapped IBM i user profile will be used to access the LANSA system. You will need to ensure that the IBM i user profiles have proper authority to LANSA and have the correct library lists, etc. For more details refer to LANSA Web and IBM i User Profiles.
For details of how to register the users, refer to Step 4. Register Web Users in Partial User Authentication.