If you really feel the need, you can disable logging and use a script to write the logs. You can then format things in whatever way you want. I'm guessing this will be more time consuming than using the built in logging, but I don't know for certain.

To write your own log files:
Code:
on *:text:*:*: {
  write $+($chan,.,$network,.,$date(yyyymmdd),.log) $+([,$time(hh:nntt),]) $+(<,$nick,>) $1-
}


You can easily change the $time format if you want. And, if you don't like that format for the filenames, you can change that as well.

Filename format is:
#channel.network.date.log
#Invision.IrcHighway.20050908.log

I'd recommend not logging all channels... this script will log all channels and queries and chats the way it is right now. You may want to limit it to just specific channels. That's up to you.

Invision Support
#Invision on irc.irchighway.net