Check Data Services user and rights management - step by step instructions. In section 3. Granting access to the repositories I explain how to grant access to individual repositories:
"
Note: By applying the same method at the level of the Repositories folder in the “Data Services” area in the CMC, the user will be granted the same access level to all repositories at once. Both mechanisms can be combined to give the developers full control over their own repository and read access to anybody else’s:
- Grant View access to every individual developer (or to the “Data Services Designer Users” group or to a special dedicated group, for that matter) at the level of the Repositories folder. Make sure that, when using the default group for this, it comes with the default settings. If it doesn’t, simply reset security settings (on object repositories and on all children and descendants of object repositories) on the default group before attempting this operation.
- Grant “Full Control” access to every individual developer for his own repository.
"