I don't think that level of granularity in permissions is available. The only permissions available for shared folders is one or more of the following (of which write means all alterations, excluding deletion but including marking as read/unread).
(r)ead - search, view overviews and items
(w)rite - edit drafts/contacts/notes, set flags
(i)nsert - copy/add to directory, create subfolders action
(x) - workflow actions, like accepting appointments
(d)elete - delete items and subfolders, set \Deleted flag
(a)dminister - delegate admin and change permissions
State University of New York at New Paltz