This sets how messages containing profanity from local users will be dealt with. You can set one of the following three options: CENSOR, DROP, NONE. In addition, WARN can be set on or off. The first set controls what the recipient sees and WARN controls what the sender sees.
CENSOR - Replace unacceptable words with asterisks
DROP - Block the entire message from getting through
NONE - Ignore the profanity
WARN - Send the user a warning about the profanity
/as help filter message local <topic>
This will only be effective if FILTER MESSAGE is set to ALL or SOME. If it is set to SOME then it will only apply to +L users.