User name change is sometimes, and in my case often, used in reviewing. Now it's in Tools-Options-LO-UserData. There should be a simple user name change method. Maybe added to toolbar as a dropdown on Comment and Record Changes buttons. Only First/Last name/Initials is needed.
former component ux-advise is now keyword needsUXEval Why are you changing your name? It's not common, I think.
Pretending to be someone else sounds weird. And even tools>options>LO>user data provides no access to multiple users (you actually override settings). But even in case of such an option, I would strongly advice against a toolbar item since the function is not frequently used by most users. Keep it clean and simple. However, you can easily customize the toolbar (with some room for improvements, admittedly). But first you would have to write a macro that reads and changes the environment variable. Shouldn't be a big deal, though. -> INVALID
OpenOffice.org had a tool to manage several users. The macros are still there. You can find them in library 'Gimmicks', the module 'UserFields'. They had not been maintained for a long time, and you would need adapt it to the current version of LibreOffice. But it shows, how such switching user data can be done by macros.
(In reply to raal from comment #1) > Why are you changing your name? It's not common, I think. (In reply to Heiko Tietze from comment #2) > Pretending to be someone else sounds weird. And even tools>options>LO>user > data provides no access to multiple users (you actually override settings). I use it for tracking multiple legal changes to the text of some regulation. Username is not a personal name then, but name and number of the official gazette. In that way, I can see what changes were made and when. Another use would be putting name of the reviewer's company only, when name of the reviewer is not relevant. So, I don't think this one is invalid. Wontfix, maybe, if you say so. And I didn't request for a separate toolbar item, but a dropdown.
An example for tracking multiple legal changes in previous comment is given in attachment 132713 [details].