Automatically citing all entries with keyword

Question

Is there a way with biblatex to automatically cite all papers with a certain keyword or from a certain resource, while keeping the original citation order and adding the uncited publications at the end?

The usual way, i.e. with \nocite{*}, includes all resources, which is definitely not wanted and would include other1 in the example below. Putting a \nocite{*} in a refsection, the citation markers are not related to the main text.

\begin{refsection}{lib-own.bib}
  \nocite{*}
\end{refsection}
\printbibliography[...,section=1]

---

\documentclass{scrartcl}
\usepackage[style=phys,biblabel=brackets,pageranges=false,backend=biber,sorting=none,defernumbers=true]{biblatex}
\usepackage{filecontents}

\begin{filecontents}{lib-own.bib}
@article{own1,
    author = {John Doe},
    title = {First pub},
    year = {1993},
    keywords = {mypub}
}

@article{own2, 
    author = {John Doe},
    title = {Second pub},
    year = {1994},
    keywords = {mypub}
}

\end{filecontents}
\begin{filecontents}{lib-other.bib}
  @article{other1,
    author = {Otto Maler},
    title = {First ref},
    year = {1993}
  }

  @article{other2, 
    author = {Peter Schuster},
    title = {Second ref},
    year = {1994}
  }

\end{filecontents}

\addbibresource{lib-own.bib}
\addbibresource{lib-other.bib}

\begin{document}

\cite{own1}\cite{other2}

\printbibliography[keyword={mypub},heading=subbibliography,prefixnumbers=S,title=publications]
\printbibliography[notkeyword=mypub,heading=subbibliography,resetnumbers=true,title=references]

\end{document}