How to clean a specific project's cache

I'm working in a large enterprises, so I must take part in many project (a prime large project and many short-term project).

Their cache and index file store in the same folder togother. I'm troubled about how to clean cache and index file of these short-term project, but keep the cache of the large project because rebuilding cache and index of large project need so long time.

'File -> Invalidata Caches/Restarts' will clean cache of all project.

Putting cache of project together is a so bad design. Is there some workaround to clean cache of some project but retain others?

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