\startsetups btx:list:author:normalshort
    \fastsetup{btx:list:author:concat}
    \begingroup

\ctxluacode{document.CheckMeB("\currentbtxdataset","\currentbtxtag",\number\currentbtxauthorindex)}
    \ifx\currentbtxinitials\empty \else
        \currentbtxinitials
        \btxparameter{separator:initials}
    \fi
    \ifx\currentbtxvons\empty \else
        \currentbtxvons
        \ifx\currentbtxsurnames\empty \else
            \btxparameter{separator:vons}
        \fi
    \fi
    \ifx\currentbtxsurnames\empty \else
        \currentbtxsurnames
        \ifx\currentbtxjuniors\empty \else
            \btxparameter{separator:juniors}
            \currentbtxjuniors
        \fi
    \fi
    \endgroup
    \fastsetup{btx:list:author:others}
\stopsetups

\startbuffer[ref]
@article{solo,
  author = {MyLast, MyFirst},
  title = {Solo work},
  journal = {Journal},
  year = {2000},
  month = {1},
  volume = {1}
}

@article{co,
  author = {OtherLast, OtherFirst and MyLast, MyFirst and CoLast, CoFirst},
  title = {Joint work},
  journal = {Journal},
  month = {1},
  year = {2000},
  volume = {1}
}
\stopbuffer

\usebtxdataset[ref][ref.buffer]
\setupbtx[dataset=ref]

\definebtxrendering[ref][dataset=ref]
\setupbtx[default:cite]
    [alternative=authoryear,
     etallimit=1,
     authorconversion=normalshort] 

\startluacode
    BoldNames = {
        {firstnames = "MyFirst",
         surnames = "MyLast"},
        {initials = "C",
         surnames = "CoLast"},
    }

    function document.CompareNames(reference, targets)
        -- Loop over targets 
        for _, target in pairs(targets) do

            -- Loop over fields
            for key, value in pairs(target) do

                if reference[key] == nil then
                    break
                end

                full_entry = ''
                for _, part in ipairs(reference[key]) do
                    full_entry = full_entry .. ' ' .. part
                end
                full_entry = string.sub(full_entry, 2)

                if full_entry == value then
                    return(true)
                end
            end     
        end
        return(false)
    end 

    function document.BoldNames(set, tag, aut)      
        local c = publications.getcasted(set, tag, "author")

        if document.CompareNames(c[aut], BoldNames) then
            context("\\bf")
        end
    end
\stopluacode


\startsetups btx:list:author:normalshort
    \fastsetup{btx:list:author:concat}
    \begingroup

    \ctxluacode{document.BoldNames("\currentbtxdataset","\currentbtxtag",\number\currentbtxauthorindex)}
    \ifx\currentbtxinitials\empty \else
        \currentbtxinitials
        \btxparameter{separator:initials}
    \fi
    \ifx\currentbtxvons\empty \else
        \currentbtxvons
        \ifx\currentbtxsurnames\empty \else
            \btxparameter{separator:vons}
        \fi
    \fi
    \ifx\currentbtxsurnames\empty \else
        \currentbtxsurnames
        \ifx\currentbtxjuniors\empty \else
            \btxparameter{separator:juniors}
            \currentbtxjuniors
        \fi
    \fi
    \endgroup
    \fastsetup{btx:list:author:others}
\stopsetups 



\starttext

Citations: \cite[solo] \cite[co]

\startsubject[title=Bibliography]
\placelistofpublications[ref][method=dataset]
\stopsection

\stoptext