Figured is a collaborative tool aimed at bringing the whole farming team together.
In the case of multi-farm, it can oftentimes be a pretty large team that needs to be added into the one Figured farm, and with multi-farm specific permissions it means that farm manager A can sort out their side of things - without seeing farm B's budgeting and reporting.
To enable a user for multi-farm permissions, you first need to invite them to the farm.
Once you've done that, head into their user under Settings> People and from there you can set their access on a per farm basis.
NOTE: When multi-farm specific permissions are enabled, a user cannot approve or unlock a budget even if given can edit access.
These multi-farm permission levels will flow through to all parts of the farm - dashboard, trackers, budgets, and reporting.