If you had googled it you would have saved some time posting here; and waiting for responses to come!

Anyway some reading to you

http://en.wikipedia.org/wiki/Virtual_office

And the service provider could be Qtel, with its product

http://www.qtel.com.qa/OffInBox.do?prodtype=2

Regards!!

PS: just click on the link for additional details on the service you want here in qatar

http://www.bing.com/search?q=virtual+office+qatar&form=QBRE&qs=n