I am using software professional proseries stand alone, with 3 users and 3 PCs. When I set up and install software,  I input 3 users identity  in each part tool/firm/prepare of  PC and assign each tax prepare a PC.
Even I check back ground my tax prepares. But I am not confident when the user makes any mistake in public . There is owners' identity such as SSN, EFIN, FEIN, CAF, PTIN phone , fax , email etc... Any advise and any way to the least disclose owner/tax prepare's identity in all PC  and not interrupt service when prepare income tax