In input data or service, the links are saxed with all their themes, whatever the theme(s) of input data or service.
For example, if a input data or service is configured with links of theme A, B and C, but a link belongs to theme A and theme D, it is impossible to determine which theme is concerned by the service or input data, because the receive XML is the following:

<link id="directoryLink://xxxx" lang="fr" ..>
     <themes>
           <theme name="A">Theme A</theme>
           <theme name="D">Theme D</theme>
     </themes>
</link>

So it is impossible to apply a filter with a combobox of available themes (A, B, C) in input data or service.
Only "Theme A" should be saxed.