Instead of using /k or wd, you can create and/or join a custom chat channel. This custom channel can optionally be password protected.
/joinchannel GS or /joinchannel GS <password> if there is a password.This will need to be done from every alt you want to see the chat and dont forget to add user chat 1 to your chat window filter
/o to talk it is /uc1 or just /1/joinchannel <channel name> <password> to join a user channel. Passwords are optional/leavechannel <channel name> to leave a user channel/listchannels to list all the channels you are connected to/# <your message> to type in user channel #1-8