Use this wiki plugin to display text in a monospace font. By default, the monospace font specified by the browser is displayed, but another monospace font recognized by the browser may be used as well.

This code,

{MONO()}This is the browser's default monospace font.{MONO}

Would produce:
This is the browser's default monospace font.

This code,

{MONO(font="Lucida Console")}This is the monospace font called Lucida Console.{MONO}

Would produce this:
This is the monospace font called Lucida Console.

• Wiki-Syntax Text: Quick Reference Basic Text Formatting - which shows a wiki-syntax shortcut to producing monospace text
• PluginFont - set the font and size of text