Sarah,
Are you trying to use 3dANOVA and 3dMVM to build the same model and perform the same analysis? In other words, do you just have one condition: face-shape? If so, remove "condition" and try something like
3dMVM -prefix 3dMVM_PPG -jobs 24 \
-bsVars group \
-num_glt 3 \
-gltLabel 1 'HC-PT' -gltCode 1 'group : 1*HC -1*PT' \
-gltLabel 2 'HC-TC' -gltCode 2 'group : 1*HC -1*TC' \
-gltLabel 3 'TC-PT' -gltCode 3 'group : 1*TC -1*PT' \
-dataTable \
Subj group condition InputFile \
...
Gang