Block an extenension making external calls

Appreciate all the help the routing module is working in my outbound route I can allow or block an extension completely wonderful would now like to allow certain number to be dialled and certain numbers not and my understanding is I could make more outbound routes or dummy routes and then allow or disallow extensions. At the moment my one outbound route under my dial pattern third block(match pattern) has 10 X in it and I can dial anywhere
We have a 10 digit numbering range. for a local call we would dial say 011 followed by a 7 digit number and say for a mobile 082 followed by a 7 digit number so basically as an example I would like a particular extension to phone local 011 followed by 7 digits but not mobile 082 followed by 7 digits and I am not sure what to put in to the match Patten to do this
Have the situation were I can now allow calls or block calls need to just get the in-between
As always thank you