Input text at registration

[alelb22]

Hi everyone and thanks in advance for reading this!
I been wondering.. is there any way to make it possible to create a field where the users can input a text that will be or stored or sent to the administrators of the board when a new user registers?
I have a gaming forum and it will be easier to the administration of new members know in which server they play, so... they should input, when register, something like: "Server A" or stuff like that.. or it will compromise the security of the board?
The idea is that the "server box" have a limited characters quantity... ideas?
Maybe they can edit their signature at register, but that can also be a way to spam in the server, so, I'm opened to suggestions...

Thanks!

Edit:
If this helps, the version of the board is 1.1.14

[Oldiesmann]

It's not that easy to do with 1.1, but you can do this quite easily with the built-in custom profile fields feature in 2.0 (display it on registration, prevent anyone but the admins from seeing it, limit how many characters they can input, etc.)