Absolutely Not,
Fiverr never allowed buyer and sellers to deal and communicate outside because of security reasons
Fiverr's system is very active In case of any seller or buyer ask you to deal outside Fiverr you have to report It
After that Fiverr checks that really this person is asking to deal outside Fiverr and Finally Fiverr block seller or buyer or both accounts
So be careful Never accept or Give payment outside of Fiverr