There's always been controvercy when it comes to whos playing guitar on Peter's PVK albums. But yes, it's him playing lead guitar on the songs on "Blues For Dhyana". (That's MY opinion, though...)
The two exception may be "What Am I Doing Here" and "Liqour And You", which went through tons of overdubs by session guitarist during the Kolors sessions.
Funny title though... Dhyana????