Here they use LCSW and CSW to differenciate between Certified therapists and Licensed therapists

LCSW = Licensed Clinical Social Worker
CSW = Clinical Social Worker

and here is what I found on my State Board of certified and licensed clinical social worker website that explains the difference between the two types of therapy professionals here.

Definitions
(1) Persons represent themselves to be Licensed Clinical Social Workers within the meaning of this Act if they state or imply they are Licensed Clinical Social Workers, or use the letters LCSW as part of their professional identification in conjunction with their name.
(2) The term "Licensed Clinical Social Worker" includes acts or behaviors within the purview of the practice of Clinical Social Work as defined in Chapter 675, Oregon Laws, 1979.
(3) The term "Clinical Social Work Associate" means a person who holds a master's degree from a college or university accredited by an accrediting body recognized by the Board, whose Plan of practice and supervision has been approved by the Board, and who is working toward licensure in accordance with ORS 675.510 to 675.600 and Rules adopted by the Board and includes any person who has completed a Plan of practice and supervision, but who has not yet completed the licensing requirements of OAR 877-020-0008.

Requirements for Certificate of Clinical Social Work Associate
Upon application and payment of the required fee, the Board shall issue a Certificate of Clinical Social Work Associate to any applicant who furnishes evidence satisfactory to the Board that the applicant:
(1) Holds a master's degree in social work from a college or university accredited by a credentialing body recognized by the Board.
(2) Has developed a Plan of Supervision approved by the Board for completion of the practice and supervision requirements. The two-year requirement begins at the time the Plan is approved by the Board.
(3) The Board may refuse to renew the Certificate of any Clinical Social Work Associate who fails to file the required forms in a timely manner.

Licensing Requirements
All persons applying for licensing as a clinical social worker shall furnish evidence satisfactory to the Board that the applicant:
(1) Has satisfactorily completed the requirements of Certificate of Clinical Social Work Associate and paid the required fees, and has performed to the satisfaction of the Board in the examination prescribed by the Board. The examination shall include a national clinical exam section and an Oregon state section, each part to be scored separately. The applicant must pass both parts to be licensed. The subjects upon which an applicant may be examined shall relate to the following core competencies, the understanding of which is essential to effective practice:
(a) The contents of ORS 675.510 to 675.600 and OAR chapter 877, which are the Oregon statutes and administrative rules governing the practice standards and responsibilities of a Licensed Clinical Social Worker.
(b) Oregon Revised Statutes relating to mental health practice that may be relevant to clinical social work practice.
(c) Human Development and Behavior.
(d) Issues of Diversity.
(e) Diagnosis and Assessment.
(f) Psychotherapy and Clinical Practice.
(g) Communication.
(h) The Therapeutic Relationship.
(i) Professional Values and Ethics.
(j) Clinical Supervision, Consultation, and Staff Development.
(k) Practice Evaluation and the Utilization of Research.
(l) Service Delivery.
(m) Clinical Practice and management in the Organizational Setting.
(2) The applicant must be fit to practice clinical social work. A lack of an applicant's fitness to practice may be established by references to acts or conduct that would cause a reasonable person to have substantial doubts about the individual's honesty, fairness, and respect for the rights of others and for the laws of the state and nation. The conduct or acts in question must be rationally connected to the applicant's fitness to practice.