That probably is the closest you're going to get. There is no such function as pre-moderation in the stock-UBB. And I've never seen nor heard of a hack to do this.
You can always try asking in the UBB Code Hacking forum or over at
https://www.ubbdev.com and see if anyone has any ideas on a possible hack.
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Doug
darksaber.hispeed.comI am altering the deal. Pray I don't alter it any further.
--Darth Vader, The Empire Strikes Back