Is it possible to include a motion in a General Meeting (rather than an AGM) to approve levy collection with no increase in NSW.
Not sure what you mean? Are you trying to overturn levies set at a previous AGM?
To answer the fundamentals of your question, you can propose any motion for a general meeting whenever you like. That motion must then be put on the agenda for the next general meeting to be held or, if there is enough support from other owners or from the strata committee, a specific general meeting can be organised to discuss the issue.