I have a network with no domain, a few computers, each with a separate administrator account, all different passwords. Will Yaware work. TimeTracker Network Setup?

You will work, but you will not likely be able to establish a client remotely. Yaware.TimeTracker Network Setup needs to be run as user that exists and has root privileges on your computer. The same user, with the same password and administrator privileges, must exist on the remote computer. When these two rules are executed, and the terms that are described above will allow you to set the client remotely. In your case, you need to create a user with the same name, password and administrator privileges on all network computers and run Yaware.TimeTracker Network Setup on his behalf.