I don't know that you can do what I imagine you are trying to do. Never tried.
You can, however, create a symbol with multiple var text objects (lines of text) and specify on symbol placement which text objects are shown by defining groups in the symbol. There is a tutorial on symbol creation that explains the process. Think it's on this site. If you can't find it and think it'll help; holler back and I'll dig for a copy and see if I can determine where to find it.