I don’t know about a list but here are their duties in a nutshell:

The Owners Corporation (OC) comprises all owners in a building.  You are a member of this whether you want to be or not.

The Strata Committee is elected by the OC at the Annual General Meeting – or at least, by those owners who bother to turn up.

The Building Manager (aka building services manager) in Victoria is often recommended by or is a subsidiary of the Strata Manager .  Think of them like a hotel manage.  They are hired to look after all the day-to-day stuff in the building, such as hiring tradespeople and dealing with physical and/or social issues. Depending on the size of the building, they are usually exclusive to that block or shared between two or three.

The Strata Manager (or strata managing agent) is an office-based administrator who looks after collecting levies, paying bills and organising meetings of the OC. Both the strata manage and Building manage are hired by the OC and can be dismissed by them.

In many buildings, there is a common misconception, that the Strata manager is at the top of the pyamid and the owners at the bottom. In fact, the owners collectively have the power to direct or dismiss the committee and the manages, so they ultimately have the power.

On the other hand, individual owners sometimes think they can order the building and strata managers to do their bidding, and that is not the case either.

Think of it like an hotel in which you are a shareholder. There is a board of directors (the committee) a CFO (the strata manager) and a general manager. 

For more information, have a look at the Consumer Affairs Victoria website