Not exactly, if you lock your domain, your domain status will be registrar-lock. eg:
Domain Name: CNOBIN.COM
Registrar: BIZCN.COM, INC.
Whois Server: whois.bizcn.com
Referral URL:
http://www.bizcn.com
Name Server: DNS.BIZCN.COM
Name Server: DNS.CNMSN.NET
Status: REGISTRAR-LOCK
Updated Date: 25-jul-2004
Creation Date: 06-nov-2002
Expiration Date: 06-nov-2005
In this status, you cannot transfer your domains to other registrar untill you unlock them. But you can modify and renew it as usual. For deletion, I think you cannot delete any gTLD domains if they are older than 3 days, no matter registrar-lock or not.