The Permissions tab of the Remote Procedure property sheet has the following components:
Users list Lists the users who have permissions on the remote procedure. If you want to add users to the list, click Grant. To remove permissions from a user, select the user and click Revoke. You can select multiple users by holding Shift while you click.
Click the Execute field beside each user to grant or revoke permissions.
Grant Displays the Grant Permission dialog, which lets you grant permissions for the remote procedure to other users or groups.
Revoke Revokes permissions for the remote procedure from the user or group and removes them from the Users list.