Share users who can access certain columns only

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Can Smartsheet add this feature to control the share users who can only access certain columns? It is an important and useful feature for the collaboration between users from different organizations; especially for the audit process. For example, I am working with third-party auditors who request information based on an Excel spreadsheet questionnaire. I imported the spreadsheet into Smartsheet to check the progress of other team members from different departments across the organization. Smartsheet makes it easy to assign ownership of the audit items to team members. The third-party auditors also want to review and remark on the smartsheet during the audit review meeting. It's important that everyone works on the same sheet, but restricts the edit permission to a specific column for the intended party. The auditors were impressed with the use of the smartsheet which saves everyone time, minimizes redundant spreadsheet update revision and email/file exchange.