If you can elaborate your query it would be more clear. Do you have some specific objective for LNA primers in the qRT-PCR...in my opinion they will turn out to be more expensive for general/routin use
We used LNA to knockdown some RNAs and tested their expression level by qRT-PCR. It works perfectly! You just have to make sure that the primer that you are using for q-PCR do not overlap with the LNA sequence to make sure that the all RNA molecule is degraded. I hope that helps.