By default no: It's a block device, so it has no idea what the file system on top is doing. Mounting the same file system in rw mode twice would result in instant corruption unless the file system is built for that. I'm not sure such a file system exists.
What would work is mounting the same file system read only from multiple machines.
I ask because it would be nice to run a traditional database this way for HA. I suppose nearly as good is being able to instantly mount and unmount across multiple machines if you could also use FoundationDB to fence writes to the device if the old writer comes back as a zombie.
What would work is mounting the same file system read only from multiple machines.