Lavaliered, etc. are terms related to relationship commitment levels between a girl in the sorority and a boy she is dating (or in theory a girl she is dating, I suppose). Anyway, a candle pass is handled by the rituals director who works under vp: programming.
Here is one recent thread about how it works.
I'm wondering if you mean more of a candle pass that is done to talk about what each member is going through. We used to do those at chapter retreat (both my own chapter and the one I advised) and called them Hannah Passes because we each passed Hannah around. I believe this would be more of a vp: social standards job than the other candle pass.
Other DGs - do you know what I'm talking about? Maybe someone else on here can better explain it.