how?

What do you mean? That's very broad.
In real life
Facebook
Ingame
Forums
Etc...

forums

Well if you're looking to find people's public profiles then use this link and replace the obvious with the username you're looking for.

http://forum.toribash.com/member.php...e=UserNameHere

Or google it by type ''site:toribash.com Name Here''

If you are talking about in-game search, then "big bro" will help you.

or u can type ingame

/rf to refresh server list and then

/sa username

in forums u have a list of who is online in the lower part of the index page