Two ways. Both of these are from the documentation: --charid charid1, charid2, ... allows you to supply a list of character ids, and will affect characters whose ids come from this list. Non-GM Players can only affect characters that they control. --name name1, name2, ... allows you to supply a list of character names, and will look for a character with this name to affect. Non-GM Players can only affect characters that they control.