Connection actually has a more sophisticated version of this than "full blown" Unity (Connection actually now has more features in many ways than Unity and far more sohpisticated scheduling, ASR, greetings, language management etc... - just for the record - it's not Unity's "little brother" any more).

With Connection 7.0 you can setup each alternate extension (or primary extension) to skip the password when calling in from that number - you can still set it up to skip password collection when calling from any number assigned to a user but it's better to be selective about it - for instance when calling from your cell phone allow the pw to be skipped but when calling in from your work phone (which may be in an open cube for instance) require a password.

Not sure which version of Connection you're talking about - but with 7.0 this is on the phone menu page and the "advanced" page on the alternate extensions section if you want to turn it on/off for specific alternate extensions.