You can use an expression based on a column with a variable like label_yes,
label_no... (Or 1 and 0)
http://christopherwesson.azurewebsites.net/2014/03/19/labelling-expressions-for-qgis-2/#sthash.N8eosK2R.dpbs
Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
Le 2014-12-02 23:18, "Brett Adams-2 [via OSGeo.org]"
<ml-node+s1560n517611...@n6.nabble.com> a écrit :
H1 Folks, How do I label only the selected features?
Running 2.6.1 Thanks Brett Adams Spinifex Geophysics 0438
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