If I select a value on a lookup field on a particular record, is there a way that this selected lookup value gets hidden and does not display in another record? Lets say I have an object Object1\_\_c which has a lookup field (Object2\_\_c). Object2\_\_c has 3 records "A, B and C". Now I create a new record on Object1\_\_c and select value "A" on lookup field. Now when I create a 2nd record on Object1\_\_c , the lookup field should only give me the option to select either B or C. not A. Is this poosible?