Block a Marketo field based on individual campaign, not just on which source the data comes from

Dear Marketo, 

It will be really nice to add a feature to temporarily unblock a field from a particular campaign in the future releases. 

At the moment, whatever option is ticked in field management, it applies to the entire instance. 

We have some many scenarios, where we only need to block/unblock a particular field for a specific campaign, after the campaign is completed, the rule is no longer applied. 

Sincerely,
Wayne