ACLs are fundamentally incompatible with blockchains. Your only solution is to encrypt those files, and have off-chain key management if you ever want to revoke access.
In fact, while F2FS is a ludicrous example, this happens regularly with filesystems. The core design of filesystems is still built assuming that a block device will be behind it. IPFS is the same way, just s/block device/blockchain/.
- You can have files on IPFS and no blockchain whatsoever "behind it".
- IPFS itself makes no use of blockchains as an abstration for data storage or file organization
- If all the blockchains networks and nodes disappeared overnight, no IPFS nodes would be affected.
I don't know if you actually used any of that or just going by hearsay.
There's a separate "layer on top of IPFS" called Filecoin that does involve a blockchain. (From a technical point of view, it's not really a layer on top, more of a re-implementation of IPFS with a blockchain.)
I've worked on IPFS and know many of the key people at PL. They really are not blockchain people or cryptobros. They are much different from anyone else in crypto I have encountered. But ultimately they have to fund their activities somehow, and this is the reality of where the business potential is in P2P circa mid-2020s.