The two leaders had reportedly accused BJP leader Dhumal, the then Chief Minister in 2002, of amassing assets through "corrupt" means.
Sharma, Deputy Leader of Congress in Rajya Sabha and Vora, AICC Treasurer, appeared before CJM Ranjit Singh along with their counsels and furnished collateral security bond under section 437.
The CJM adjourned the case and fixed the next hearing for December 10, 2015.
Amarinder Singh, former Punjab Chief Minister who was also accused along with Vora, has already been dischargedby the court after he tendered an apology.
The case pertains to 2002 when Sharma, Voraand Amarinder Singh allegedly made "defamatory" remarks.