By wake do you mean from actual sleep or just from monitor sleep?
Multiplicity does have a wake on lan feature but that has to be enabled by yourself so that shouldn't be the case. But if you did enable that then you can disable it from the settings on the connection.
If this is a case of waking from monitor sleep then make sure you do not have the option on the primary in settings "Prevent secondary computers auto sleeping when using this computer" turned on as that will wake monitors.
I don't know what other thread you are referring to so I cannot comment on that.