Yes. A CommSec Margin Loan can be linked to your Options account for covered call writing. To settle your trades through your Margin Loan you will need a separate ETO account.
To do so, please contact the CommSec Options Support for further information on 13 15 19 (Monday to Friday, 8am to 6pm Sydney time).
Please obtain and consider the product disclosure statement (PDS), available from the Commonwealth Bank of Australia (ABN 48 123 123 124 AFSL 234945) as the product issuer, at www.commsec.com.au before making any decision about the product.