Yes, you can. And if your application is built in a correct modular way, this is exactly what it is for, and easily done by setting module-roles. So module Finance can have ' internal finances' and 'external finances'.
NB. F-Admin often gets god-mode, which you should be careful with. The F-admin has no business snooping around in the companies finances. And booking assets is also not part of the job of an F-admin.