Does the Pali word "vinaya" in the suttas always refer to the Vinaya Piṭaka?

I read the following comment on the secular internet in relation to the closing paragraphs of DN 2, where a King or layperson made an admission of a moral transgression/sin to the Buddha: > Yes that confession is especially by and to monks -- "the discipline" > as you quoted it is the Vinaya. Does the Pali word "vinaya" in the suttas always refer to the Vinaya Piṭaka, i.e., the Pāṭimokkha rules made exclusively for monks & nuns?