We have multiple team members using live workspace.  Each member has their own expertise and we really don't like the idea they can see eachother's tasks.  Is their away to give them editing ability but not to see everyone else's assignments?

There isn't a way to do this within a single workspace, but each individual can create their own private task list in the "Documents" workspace.

If the owner of the original workspace wants to see each of those task lists, then the individuals can each share their task list with the owner.

Hope that helps,

Ned