Hi Guilherme,
Yes you can do this in LINKPlanner using the Channel Plan feature and allocating a frequency carrier to each AP, see our article on the Knowledge Base "How to create and use PMP Channel Plans", http://community.cambiumnetworks.com/t5/LINKPlanner-FAQ/How-to-create-and-use-PMP-Channel-Plans/m-p/40639#U40639
Regards,
Rachel