Good news everyone.
After a little bit of work, the code piece suggested in this post before will work in the next release (C1 4.2)
After a little bit of work, the code piece suggested in this post before will work in the next release (C1 4.2)
<KeySelector Label="SomeText" Help="" OptionsKeyField="Key" OptionsLabelField="Value" Required="true">
<KeySelector.Selected>
<cms:bind source="BindedValue" />
</KeySelector.Selected>
<KeySelector.Options>
<f:function xmlns:f="http://www.composite.net/ns/function/1.0" name="DataFunctions.GetTeamMembers">
<f:param name="name">
<cms:read source="BindedValue" />
</f:param>
</f:function>
</KeySelector.Options>
</KeySelector>