System owner is only set when object is created in a user context.
The value can NOT be changed.
If you want to show who created an object, Never use the Account/Fullname or User/Name values.
If you do so, you create security impediments. Always use a prcess entity “Person”, “Employee”, “Customer” or alike which has a 1-1 reference to account instead add the name attribute to that process entity and use that in your application front-end.
According to described above → don’t use System.owner. But use a reference between affected entity and your process entity.
https://academy.mendix.com/link/modules/184/lectures/1451/4.6.2-Making-the-Custom-Navigation-Layout-Dynamic – here System.owner is used to filter records whose creator is the current user.
Rene van Hofwegen, not quite clear why using System.owner should be avoided, could you explain pls?