About the Upasakasila Sutta and LGBT

Is the upasakasila sutta based on the Tipitaka (Pali Canon) or is it based on the Mahayana teachings? Also, I understand that Buddhism doesn't condemn LGBT, but in the Upasakasila Sutta, it is written: > "If sex is practised under the inappropriate times (times not allowed by precepts), [at] inappropriate place[s] (places not allowed by precepts), with non-female[s], with virgin[s], with a married wife, if sex relates to self-body, it is known as sexual misconduct." Does this mean being gay (or lesbian, or being a part of LGBT) is considered sexual misconduct and therefore violated the 3rd precepts?