Control SVN access only to add, not modify once added in SVN repo
Is it possible to give add-new as well as and modify access to a user and only add new file access to other user? In short, other user should not be able to modify anything once he commits a file to SVN. Do we have this type of access control in SVN? 

As far as I know it can only be read or read\write. Please let me know if it is possible.
Control SVN access only to add, not modify once added in SVN repo
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Is it possible to give add-new as well as and modify access to a user and only add new file access to other user? In short, other user should not be able to modify anything once he commits a file to SVN. Do we have this type of access control in SVN? 

As far as I know it can only be read or read\write. Please let me know if it is possible.