ACR CLEARED TO CROSS RWY AS COMMUTER WAS CLEARED FOR TKOF SAME RWY. OPERATIONAL ERROR.

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CVG GND CTL ISSUED OUR FLT (ACR X) A CLRNC TO TAXI TO RWY 27L VIA TXWY 'G' WITH CLRNC TO CROSS RWY 27R. AS WE WERE XING 27R WE NOTED COMMUTER Y WAS AT THE DEP END OF 27R; WE EXPEDITED ACROSS 27R AND PROCEED TO 27L. AS WE SWITCHED OVER TO TWR ON 118.3 WE HEARD ACFT Y PLT ASKING TWR WHY THEY HAD BEEN CLRED FOR TKOF AND THEN HAVE US TAXI ACROSS 27R IN FRONT OF THEM. THE TWR CTLR THEN SAID 'THAT THERE HAD BEEN A MISCOM BTWN TWR AND GND.' THE CAPT THEN ASKED TWR IF THERE WAS A PROB AND TWR SAID NO AND THEN CLRED US FOR TKOF. AS WE WERE CLBING OUT TWR SAID TO CONTACT DEP. AGAIN THE CAPT ASKED IF ANYTHING WOULD BE DONE AND TWR SAID NO; NOTHING WOULD BE DONE OR REPORTED. IT APPEARED TO ME THAT IT WAS EXACTLY AS THE TWR CTLR SAID; 'A MISCOM BTWN ORD AND TWR.' AS WE WERE ON GND FREQ AND ACR Y WAS ON TWR FREQ; NEITHER ONE OF US COULD POSSIBLY KNOW WHAT CLRNCS OR INSTRUCTIONS WERE ISSUED TO EACH OTHER. SUPPLEMENTAL INFO FROM ACN 99438: COMMUTER Y WAS TAXIED TO RWY 27R. ACR X CALLED NEXT AND WAS TAXIED TO RWY 27R. HE DIDN'T MOVE FOR ABOUT 2 MINS; THEN I OBSERVED HIM TAXIING TOWARDS TXWY G FOR RWY 27L. ASKED HIM IF HE WOULD RATHER HAVE RWY 27L. HE ANSWERED AFFIRMATIVE; SO I TAXIED HIM TO RWY 27L AND DID NOT ISSUE HOLD SHORT OF RWY 27R.