ANC LCL CTLR EXPERIENCED OPERROR WHEN MISIDENTING AN ACFT AND THEN ISSUING INSTRUCTIONS TO THE WRONG ACFT.

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ON JUN/FRI/05 AT APPROX XA30; I WAS WORKING THE LCL CTL POS AT ANC. TFC WAS HVY AND THE LCL ASSIST POS WAS OPEN. I HAD AN ACR Y WDB LAND RWY 6R AND EXIT AT TXWY D. ACR Y WAS TOLD TO CROSS RWY 6L AND CONTACT GND. FOLLOWING ACR Y; ACR X LANDED RWY 6R IN AN UNMARKED WHITE WDB. MY ATTN TURNED TO RWY 2 WHICH HAD SEVERAL ACFT XING AND BACK-TAXIING DUE TO MULTIPLE TXWY CLOSURES. WHEN I RETURNED MY ATTN TO RWY 6R; I MOMENTARILY MISTOOK ACR X FOR ACR Y (ACR Y OFTEN FLIES WHITE; UNMARKED WDB'S) AND TOLD ACR Y TO TURN L AT TXWY D. I RECEIVED NO RESPONSE SINCE ACR Y WAS ALREADY ON GND CTL. ACR X TURNED L AT TXWY E AND HELD SHORT OF RWY 6L. OUR FACILITY HANDBOOK STATES THAT A WDB MAY NOT HOLD ON TXWY E WHILE ANOTHER ACFT LANDS ON RWY 6R. AT THIS POINT; ACR Z (A WDB) WAS ON ABOUT A 1 MI FINAL FOR RWY 6R. WHEN I RECEIVED NO RESPONSE TO THE INSTRUCTION TO USE TXWY D; I REALIZED THAT I WAS USING THE WRONG CALL SIGN. AT THIS POINT THE NATURAL PROGRESSION OF MY SCAN WAS TO LOOK AT MY STRIP BOARD TO OBTAIN THE CORRECT CALL SIGN. BEFORE I COULD DO THIS; HOWEVER; MY OPS MGR WHO WAS MONITORING IN THE TWR CAB (NOT PLUGGED INTO OR SIGNED ON ANY POS) WALKED UP NEXT TO ME AND IN A RAISED VOICE TOLD ME TO 'CROSS ACR Y; CROSS ACR Y' WHILE POINTING AT ACR X ON TXWY E. BELIEVING THAT MY OPS MGR HAD THE CORRECT INFO; I DID NOT HESITATE AND; USING THE MOST RECENT ACR Y CALL SIGN; TOLD ACR Y TO CROSS RWY 6L; TWICE. I RECEIVED NO RESPONSE SINCE ACR Y WAS ALREADY ON GND CTL. MY OPS MGR THEN TOLD ME TO 'SEND THAT GUY AROUND.' STILL BELIEVING THAT MY OPS MGR WAS CORRECT; I LOOKED AT MY STRIP BOARD WHICH HAD ACR Y IN A XING POS. I THOUGHT THAT IF ACR Y WAS THE ACFT HOLDING BTWN THE RWYS; AS I WAS BEING TOLD BY MY MGR; THEN THE NEXT STRIP (ACR X) MUST BE THE ACFT ON SHORT FINAL. I TOLD ACR X TO GO AROUND; TO WHICH THEY RESPONDED 'WE ARE ON THE GND.' AT THIS POINT I REALIZED THAT THE INFO THAT MY OPS MGR WAS GIVING ME WAS INCORRECT. I THEN TOLD ACR Z TO GO AROUND; TO WHICH THEY REPLIED 'WE ARE TOUCHING DOWN.' I TOLD ACR X TO CROSS RWY 6L AS ACR Z WAS TOUCHING DOWN ON RWY 6R. MY LCL ASSIST TOLD ME AFTERWARD THAT SHE WAS BEGINNING TO MOTION TOWARD THE STRIP BOARD TO POINT AT THE ACR X STRIP AND TELL ME TO CROSS ACR X WHEN THE OPS MGR TOLD US TO 'CROSS ACR Y.' AT THAT POINT SHE HESITATED; BELIEVING SHE WAS CONFUSED AS WELL. MY 'LA' AND I HAD BEEN WORKING BUSY TFC TOGETHER VERY WELL FOR APPROX 45 MINS WITH NO PROBS. I AM CONFIDENT THAT HAD I NOT RECEIVED AN INCORRECT INSTRUCTION FROM MY OPS MGR; THE NORMAL PROGRESSION OF MY SCAN WOULD HAVE RESOLVED THE ISSUE BEFORE IT OCCURRED. IF IT HAD NOT; THEN AT THE LEAST MY 'LA' WOULD HAVE FIXED THE PROB HAD SHE NOT BEEN CONFUSED BY THE OPS MGR'S INCORRECT INFO AS WELL. AS A CTLR; YOU TUNE OUT A LOT OF BACKGND NOISE IN THE TWR CAB; BUT WHEN YOU HEAR A RAISED VOICE -- ESPECIALLY THAT OF A SUPVR OR A MGR -- GIVING YOU A SPECIFIC INSTRUCTION; YOU DO NOT HESITATE -- YOU ACT ON IT. THE INFO THE OPS MGR GAVE US WAS INCORRECT AND I BELIEVE A DIRECT CAUSE OF THIS ERROR. THE OPS MGR HAD NO REASON TO BELIEVE THAT MY 'LA' AND I WERE NOT WORKING OUR TFC SATISFACTORILY AND SHOULD NOT HAVE BEEN THERE. SEVERAL WITNESSES IN THE TWR; INCLUDING MY SUPVR; SAID THAT THE OPS MGR WAS BEING A DISTR.