[Brian]

I think the original poster is saying that they' prefer to not have to choose between WebDAV or Bonjour syncing.

It's possible that fast user switching on one machine while OmniFocus is running in both accounts would work, but I don't think we tested that configuration. I don't know how bonjour handles messages from one account on a machine to another account on the machine...

If it turns out not to work, get in touch with the support ninjas (from the help menu) and we can work on speeding up your WebDAV sync as much as possible.