Sawat Charoenphon, a lawyer for former Democrat MP Thavorn Senniam and core leader of the People’s Democratic Reform Committee (PDRC), filed the petition with the Civil Court on Ratchadaphisek Road on Friday.
It seeks an injunction suspending the deportation order signed by CMPO chief Chalerm Yubamrung.
Mr Sehgal is a leading member of the PDRC.
The PDRC petition argues that the CMPO could not issue the deportation order because it violates the earlier ruling by the Civil Court that the CMPO could not take action against peaceful anti-government protesters under the emergency decree.
The Civil Court on Feb 19 ruled the government has the authority to enforce the emergency decree, but not to the extent of using force to break up the PDRC's "peaceful and unarmed" demonstrations. The court issued a nine-point order to the government.
Mr Sehgal has also petitioned His Majesty the King, asking the monarch intervene to prevent his deportation.
Mr Sehgal is an Indian national who has long held permanent residence in Thailand and is chairman of the Bangkok-based India-Thai Business Association.