Thank you. I checked the tread but I am not talking about filtering the resulted data of look up. What I am talking about is filtering the lookup data based on the conditions.
Please see this image works. If I put conditions on the look up, it brings only those data in the look up which satisfies the conditions.
@pratik you can use the filter function to do this. For example make a formula field will the following formula (Iām assuming the Form field is a single select field and so you need to use totext to get its text value for comparison).