Mine

# Error handling

ErrorDocument 404 /404.php

# Rewrite engine

RewriteEngine on
RewriteCond %{HTTP_HOST} ^www\.domain\.net$ [or]
RewriteCond %{HTTP_HOST} ^domain\.net$
RewriteRule ^(.*)$ www.domain.net/$1 [L]

RewriteEngine on
RewriteCond %{HTTP_HOST} ^www\.domain2\.com$ [or]
RewriteCond %{HTTP_HOST} ^domain2\.comk$
RewriteRule ^(.*)$ www.domain2.com/$1 [L]