You can’t. This is a system wide configuration, configurable in main/java/org/olat/user/propertyhandlers/_spring/userPropertiesContext.xml
<entry key="org.olat.course.nodes.cl.ui.CheckListAssessmentController">
<bean class="org.olat.user.propertyhandlers.UserPropertyUsageContext">
<property name="description" value="Table for check lists" />
<property name="propertyHandlers">
<list>
<ref bean="userPropertyFirstName" />
<ref bean="userPropertyLastName" />
<ref bean="userPropertyInstitutionalUserIdentifier" />
</list>
</property>
<property name="mandatoryProperties">
<set>
<ref bean="userPropertyFirstName" />
<ref bean="userPropertyLastName" />
</set>
</property>
<property name="adminViewOnlyProperties">
<set>
<ref bean="userPropertyInstitutionalUserIdentifier" />
</set>
</property>
</bean>
</entry>
to:
<entry key="org.olat.course.nodes.cl.ui.CheckListAssessmentController">
<bean class="org.olat.user.propertyhandlers.UserPropertyUsageContext">
<property name="description" value="Table for check lists" />
<property name="propertyHandlers">
<list>
<ref bean="userPropertyFirstName" />
<ref bean="userPropertyLastName" />
</list>
</property>
<property name="mandatoryProperties">
<set>
<ref bean="userPropertyFirstName" />
<ref bean="userPropertyLastName" />
</set>
</property>
</bean>
</entry>
If this is a problem in your university, it will probably make sense to change this for everybody.
But consider this: how would you differentiate two users with the name „Peter Müller“ on that paper?