That is how I ended up:
\usepackage[ansinew]{inputenc}
\usepackage[backend=biber,style=numeric-
comp,sorting=nyt,bibencoding=utf8,defernumbers=true]{biblatex}
\bibliography{mybiblio}
\begin{document}
\cite{entry1}\cite{entry2}\cite{entry3}...
\printbibliography[segment=0,notkeyword=kw1,notkeyword=kw2,heading=bibliography]
%Use segment=0 here to separate from following entries
%Show only entry1, entry2, ...
\newrefsegment
\nocite{*}
\printbibliography[keyword=kw1,heading=subbibliography, title={First}]
%Show all entries with keyword=kw1
\printbibliography[keyword=kw2,heading=subbibliography,title={Second}]
%Show all entries with keyword=kw2
\end{document}