Principal Sessions Judge Audinathan ordered issuance of summons after a libel complaint was filed by the City Public Prosecutor M L Jagan yesterday.
The complaint averred that on September 12, Swamy had allegedly made defamatory comments in a micro-blogging site.
The comment was related to granting of police permission to hold a memorial meeting for a slain leader of a proscribed outfit.
Swamy had already been issued summons to appear on the same day before the same court in another defamation case filed by Jayalalithaa pertaining to the fishermen issue.