Lyngdoh has the support of National People's Party in the Shillong constituency but the Hill State People's Democratic Party (HSPDP) and Khun Hynniewtrep National Awakening Movement (KHNAM) are reportedly upset over his candidature.
The latter two parties are more keen on PBM Basaiawmoit as their candidate of choice.
"We are supporting the UDP candidate in Shillong since they will be supporting our candidate PA Sangma for the Tura seat," NPP spokesperson James Sangma told reporters.
AAP candidate, retired IFS officer A Kharshiing, sitting Congress MP Vincent Pala and Basaiawmoit are expected to file their nominations soon.