Actually we do that on my company.
On Tools > Options > Advanced
We have the "Configuration path" and "Server List Path" configurated to a network share.
Altough (since the VNC Manager only reads the list when loging in) to avoid problems of writing over others modifications, only one of the users has security set to write, while all others have "read only". So one person is elected as the one to update/configure the list and settings. This is also usefull cause of the external tools configuration file.
Hope i have helped in some way, by sharing this to you.