The web interface available way of limiting the use of a specific offering is selecting the 'Selection Type' on offering details.
Follow the below steps for enabling this feature
1. Login to Service Catalog as Administrator
2. Select Catalog tab - and select a specific offering
3. On detail page - Under 'User Request Method' pull the drop down for 'Selection Type'
4. Choose the available option i.e. 'Not Selectable' / 'Can Select Once' / 'Can Select Many Times' from the provided options
5. Save the offering