Thanks for all the help. Based on the recomended answers, and some extra browsing, I've pieced together a MWE that does exactly what I need.
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[american]{babel}
\usepackage{csquotes}
\usepackage[backend=biber,style=numeric,refsection=section,sorting=ydnt,
defernumbers=true,maxnames=99,doi=false,isbn=false,url=false{biblatex}
\addbibresource{biblatex-examples.bib}
%----------------Sourcemap to create keyword based on author-------------------%
%Search and replace "Knuth" and "NOTKnuth" with the desired author name
\DeclareSourcemap{
\maps[datatype=bibtex,overwrite=true]{
\map{
\step[fieldsource=author,
match=Knuth,
final]
\step[fieldset=keywords, fieldvalue=Knuth]
}
\map{
\step[fieldsource=author,
notmatch=Knuth,
final]
\step[fieldset=keywords, fieldvalue=NOTKnuth]
}
}
}
%------------------Create bib sections for numbering --------------------------%
\defbibnote{books}{}
\defbibnote{other}{}
\defbibnote{DifAuthors}{}
\defbibenvironment{bibliography}
{\list
{\printtext[labelnumberwidth]{% label format from numeric.bbx
\printfield{prefixnumber}%
\printfield{labelnumber}}}
\sloppy\clubpenalty4000\widowpenalty4000}
{\endlist}
{\item}
%---------------------------Begin Document-------------------------------------%
\begin{document}
\nocite{*}
\printbibliography[title={Knuth Books},prenote=books,type=book,keyword=Knuth,resetnumbers=true]
\printbibliography[title=Other,prenote=other,nottype=book,nottype=article,nottype=patent,keyword=Knuth,resetnumbers=true]
%Other authors: Just to make sure it is properly sorting the files
\printbibliography[title={DifferentAuthors},prenote=DifAuthors,type=article,keyword=NOTKnuth,resetnumbers=true]
\end{document}

It works really well for different file types, and handled my 500+ reference library, so thanks again for the pointers!
keywordsfield in those entries and then use that in your\printbibliographycommand (e.g.,\printbibligraphy[keyword=XYZ]). You can dynamically create such keywords using biblatex/biber's\DeclareSourcemap, but depending on the name, you might get lots of false positives. (A name with 'John' or 'Smith', e.g., would not be ideal.) – jon Feb 18 '16 at 04:58