Does Toribash have the option to be able to insert the username of the current user into a text automatically? Ive seen this done of forums with a similar format as Toribash.

Examples:
Hey [username], read this before posting.
[username], be sure to read the rules before posting.

I haven't seen such command but if it is added, it would be a little more comfortable for us to say names.

As far as I know, Toribash forums don't use/have this. The way you say it in examples is as if you are going to use it in Introduce Yourself. I'd prefer you to use custom message as it gives a more personal message to the beginners.

Hey you should post that on suggestion section.
That a great idea, It can be called ID's

For Instance, ID 4 is my ID from the 10 players in that room, each one has numerical order of id's. So if you choose 4 this shall be mine.