I am building an Inventory cycle counting application in ZOHO Creator, and I would like to know how I can limit the access to a given record to one person at a time. 

When I create the application, I am uploading a set of countable materials. I then will have as many as three people counting these materials around the warehouse. There will be times, that a given material is stored in multiple places that will be counted by different people. 

How can I lock down a record that is open by one person, so others can not access the record at the same time. 

Thanks

Gregg