Trying to use lpd://<username>@<host>/<queue> but it's not working

[Trel]

Every time I try to use lpd://<username>@<host>/<queue> in one of my printers, the result is it strips out <username>@ and I'm
left with

lpd://<host>/<queue> which of course means my documents will not print.

When I googled on this subject, I read that this feature IS there.
If that's the case, do I have to do something to enable it?
(Also, which was the first version that supported this?)