multiple tags

[James]

Is is possible to have simultaneous multiple tags?
I'm trying:
\version "2.14.2"

control = {
        s1*2
        \tag #'threes { \time 3/4 s2. }
        \tag #'twos { \time 2/4 s2 } }
tset = \relative c' {
        c4 d e f
        \tag #'up {g4 a b c }
        \tag #'down { g4 f e d }
        \tag #'threes { g4 f e }
        \tag #'twos { g2 } }

\score {
        \new Staff << {
                        \keepWithTag #'threes
                        \control } {
                        \keepWithTag #'up
                        \keepwithTag #'threes
                        \tset } >> }
\score {
        \new Staff << {
                        \keepWithTag #'twos
                        \control } {
                        \keepWithTag #'down
                        \keepWithTag #'twos
                        \tset } >> }

but lilypond is not happy with the doubled tags.