UM...YES
http://www.tpwd.state.tx.us/publicat.../hunt/nongame/
A Pig is refered to as an Exotic, which is allowed to be hunted at anytime (including nightime spotlighting), with ANY legal firearm (or accessory, including suppressors), provided you have the land owner's permission.
That's why those suppressed 44mag rifles are so popular for hard-core pig hunters.
The regulations you refer to,apply only to "Game Animals" (which would include a Javalia, which is NOT a pig). It is indeed illegal to hunt a "game animal" with an automatic weapon or suppressor (but not an SBR or SBS).
Now before lighting up the night's sky with full-auto fire or spot-lights, the Game-wardens usually appreciate an advance phone call saying "
Hey, we're here, doing this until this time, etc, etc, etc...." That way he doesn't get called out late at night in a pissy mood in response to lights or full-auto fire.