Yes. You’re free to choose a lawyer to defend and represent you.
In principle, only one lawyer can be appointed for each claim. If you decide to change lawyers, Foyer ARAG will cover the costs of the first lawyer, except when the change is motivated for legitimate reasons of the lawyer’s impediment (e.g. if the lawyer stops practising, if the lawyer’s authorisation to practise is revoked, etc.).
If you don’t exercise your right to choose a lawyer yourself, Foyer ARAG will appoint a competent lawyer in your name and on your behalf.