A few thoughts on this one:
1. While it's entirely possible that the Austin City Council will pass such a law, it's likely that it'd be overturned in court – much like its STR ordinance has now twice. Why? The city keeps pushing legally faulty solutions: it's a violation of state law to permit, but then prohibit, STRs in single-family, non-homestead homes (a.k.a. Type 2 STRs).
2. That article is from last December, and instead of passing an ordinance by March, they passed nothing at all.
3. Austin still can't enforce jack as far as STRs go – they lack the budget, and they've wasted untold millions fighting for a NIMBY issue unsuccessfully in court.
4. Finally, basically every city wants Airbnb to hand over their lists of hosts in any given area, but a) Airbnb has no legal obligation to do so (an Austin ordinance has no sway over a California-based corporation); and b) this would almost certainly be shot down in court as a First Amendment violation if it made it that far. There is literally nothing whatsoever illegal with solely creating a host account, and suggesting that Austin authorities can someone "police" internet content in this fashion also likely constitutes a Sec. 230 violation in addition to the 1A.