As such SAP standard does not provide release strategy for sales orders similar to purchase orders. However this requirement of your can be satisfied through authorisation profiles; what I mean to say is that the sale order to be kept incomplete by the person who does not have the required authorisation & the person with proper authorisation will complete
it for further processing. This is only one way of meeting your requirement.
In order to emulate a release strategy similar to purchase orders you can use the status profile in sales documents (BS02). IMG-Sales and distribution-Sales-Sales documents-Define and assign status profile.