You will find below an extract of the LI Work Items. The full list can be found at the ETSI Work Programme.

Technical Committee	ETSI Number	Title
LI	TS 101 331	Telecommunications security; Lawful Interception (LI); Requirements of Law Enforcement Agencies
LI	ES 201 671 TS 101 671	Lawful Interception (LI); Handover interface for the lawful interception of telecommunications traffic
LI	TS 102 232	Lawful Interception (LI); Handover specification for IP delivery Part 1: Handover specification for IP delivery Part 2: Service-specific details for e-mail services Part 3: Service-specific details for internet access services Part 4: Service-specific details for Layer 2 Services Part 5: Service-specific details for IP Multimedia Services Part 6: Service-specific details for PSTN/ISDN Services Part 7: Service-specific details for Mobile Packet Services
LI	TS 102 233	Lawful Interception (LI); Service specific details for E-mail services
LI	TS 102 234	Lawful Interception (LI); Service-specific details for internet access services
LI	TS 102 656	Retained Data; Requirements of Law Enforcement Agencies for handling Retained Data
LI	TS 102 657	Handover interface for the request and delivery of retained data
LI	TS 102 815	Service-specific details for Layer 2 Lawful Interception
LI	TR 101 943	Lawful Interception (LI); Concepts of Interception in a Generic Network Architecture
LI	TR 102 503	ASN.1 Object Identifiers in Lawful Interception Specifications
LI	TR 102 519	Lawful Interception of public Wireless LAN Internet Access
LI	TR 102 528	Interception domain Architecture for IP networks
SEC LI	TR 101 944	Telecommunications security; Lawful Interception (LI); Issues on IP Interception
SEC LI	TR 102 053	Telecommunications security; Lawful Interception (LI); Notes on ISDN lawful interception functionality
SEC LI	ES 201 158	Telecommunications security; Lawful Interception (LI); Requirements for network functions

LI Status Report