When connecting your channel manager you will have selected whether to send Restrictions to your channel manager or not.
In order to manage all restrictions from your channel manager instead of Mews, de-select the relevant operation: Upload restrictions.
Main Menu > Marketplace > My subscriptions > YourChannelManager: Settings > Enabled operations
Some channel managers also allow filtering restrictions that are being received from Mews. To facilitate this, the above Upload restrictions operation will need to remain selected.
For further information regarding these possibilities, please reach out to your channel manager provider.