Display system tags in perspective

[Cas_D]

Hey, I'm trying to display the OSUsername of the user in perspective. I've tried binding the label to the system tag and using scripting without success. I found the following topic which says you don't have access to system tags in perspective:

Perspective - System Tags

hi i’m trying to recreate one of our modules using perspective and i need the username tag, just want to ask how come the username tag is null whenever i try to drag it or bind to it? I mean, I see a value on it but when its dragged on the designer its showing as null? is there anything else i need to add or modify? This is under System > Client > User > Username I tried adding a login and viewed it on the perspective client on my phone and on the web but its still showing as null …

Here the solution is using the username that is specified in the system props. Unfortunately, that's not the username I want to display. The tag I want is the OSUsername (System>Client>User>OSUsername), which is not specified in the session props. Is there a way I can have access to this system tag so I can display the username?

[PGriffith]

No. Web browsers don’t expose this information to end users. The best you could do is require authentication from an active directory user source, at which point you can assume the (Windows) user name.